I've been living in a motorhome for nearly five years now. Mostly travelling full-time. I parked for a total of about 3 months in the Palo Alto and Mountain View areas on a couple of occasions...just on the street. I have solar power, and propane for cooking and running the fridge, and big water tanks, so I can go weeks without hooking up. Mine is quite a bit larger than Tynan's at 34.5', but I think my next rig may be smaller. There's definitely value in being able to drive/park anywhere, and my current rig does not have that quality.
I started out in Mountain View; was paying $2145/month to rent a house. The motorhome lifestyle isn't significantly cheaper, when travelling a lot, but it has a lot of other advantages. At least, for me, the advantages outweigh the negatives.
How did things hold up? The RVs I've been in look like they are definitely built on the cheap. Cabinetry assembled with staples, faux-wood paper veneers, plastic plumbing fixtures, low-grade foam rubber upholstery, etc. Fine for something most people use a few weeks a year, but actually living in continually... I'd think things would wear out pretty quickly.
Awful. Shit breaks every time I drive it, and sometimes when I don't.
I am currently more interested in conversion buses (including some that are 60 years old). Even high quality modern rigs fall apart...and mine is not a particularly high quality rig. It was about $95k when new, and I bought it for ~$30k used. It was in decent shape when I got it, much less good shape now, though I'm in the midst of getting it back into shape for sale.
The things you mention, however, are mostly not the things that have been a problem on my rig. Cabinets are solid oak and holding up great. Plumbing has never had a problem.
Things that are problematic:
Ladder got smooshed by a tree when I backed into it. Got more smooshed by a light pole in Mexico with the roads were too small. A ladder is shockingly expensive to replace ($485 for an OEM replacement).
Windshield has been broken and replaced once, and now has new cracks in it. $500 deductible each replacement.
Day/night shades are nearly all a wreck. Restringing is cheap but time consuming. Replacing is very expensive.
Roof has sprung numerous leaks over the years. The slide out, in particular, has been a source of quite a bit of water damage inside the house. It's not terrible, but it's visible if you're looking for it. Water damage hurts resale value a lot, as it is difficult and expensive to repair. Roof needs new rubber. This is time consuming, and slightly expensive.
Air conditioner broke.
Leveling jacks are getting cranky.
Electric steps have broken three times in interesting ways (never the same breakage, but always makes them unusable or less usable).
Chassis battery broke loose and was on the verge of falling out of the bottom of the rig...I just happened to stop and check things at the right time. That would have probably been a bad day.
The carpets are wearing pretty poorly. Some of the upholstery is also looking a little bedraggled.
The exterior looks rough...the fiberglass itself is fine, but the decals are all peeling off and are cracked from sun exposure. I see why so many rigs this age are sold with decals removed...the rig would look a lot better that way, though it'd look kinda plain in all white.
So, yes, motorhomes are made to look good while new, and to fall apart over the next ten years. Some are built slightly better than others. But, none are made to last, as far as I can tell.
I bought an ex-rental unit since they tend to be cheaper and built more sturdy in a lot of ways to handle constant use by people who might not treat them the best.
Sadly we weren't able to live in it as long as we'd hoped due to having to relocate back to Canada for a family illness during the winter but while we had it things worked fine.
One of the harder things I found though is the feeling of never really being clean. We had a shower in it and showered everyday, we cleaned the inside regularly but still you always felt a bit grungy compared to living in a house/apartment.
My rig is a pretty modern Ford V10 based gasoline chassis. It gets 8-11 MPG, depending on how fast I'm driving, the weather, and whether I'm going over hills or not. Towing a vehicle behind will effect mileage. But, speed is the biggest determinant of mileage.
The big diesels tend to get about the same mileage. There are some little turbo diesels built on Sprinter chassis that get up to 17 MPG.
The old (ancient) diesel rigs I'm looking at to replace my current motorhome will get about 7-10 MPG, but can be converted to waste vegetable oil, or run biodiesel. So...maybe environmentally acceptable, as long as I don't put a lot of miles on it (I tend to like to travel for short distances at a stretch anyway, so I don't drive a huge amount of miles in any given month...much less than someone commuting 20-30 minutes to work every day would, for example).
I've talked to people doing it in the US, Canada, Europe, and Australia. I've met people from dozens of countries travelling the US this way. Germans, in particular, seem to be very interested in RVing in the US.
Anywhere between 4 and 12 mpg (US). The lower mileage tends to come from gas/petrol engines -- the Ford V10 is popular. As well as smaller diesels that are towing another car (A "dinghy") up hills. The higher mileage is usually from Mercedes Sprinter based RVs, and Class 7 & 8 truck conversions.
Costs when driving are high, because of the fuel expense. But once you're parked in a campground (or even in the street like in the story) the costs are pretty low -- $200-400 a month (or $20-50 for a daily rate) for a campground. $50-200 to refill the propane tank. And $20-40 to empty the black water tank at a dumping station. Some campgrounds charge for electricity (20, 30, or 50 amp connection). Internet can be had over a parks WiFi, satellite, or a MiFi device (factoid: a 50GB plan on AT&T is $300/month), or if you're monthly, a campground may allow TimeWarner or Comcast to run a line to your rig.
I get about 10mpg with mine(30' with an E450 chassis).
Not so much young people but Australia has "Grey Nomads" who tend to be retired people that spend their time travelling around the country living in their RVs full time.
The oldtimers in RVs are called Snow Birds here in the US. They are the predominant group living fulltime in RVs here. I've met a lot of retirees in my travels.
In a large motorhome, it's a lot like a bathroom/shower in a small apartment. It's not big enough to take a shower with a friend, but it's comfortable...I've visited friends apartments with less pleasant bathrooms than mine, particularly in high rent areas like SF and NYC.
I have had four different Internet solutions since moving into the motorhome:
Millenicom 3G was first. I got hit with a $1400 bill while on the border of Canada and the US (they apparently don't protect against the modem using foreign towers, and will then bill you international roaming rates).
Then switched to a Clear 3G/4G unlimited plan. Worked OK in most places. When the modem died and my Cradlepoint proved unreliable as hell with 4G connections, I switched to..
Virgin Mobile and a tiny little hotspot with a 2GB 3G/unlimited 4G plan. It's the cheapest ($35/month), and shares Sprint's network (as does Clear). Works OK. The hotspot overheats sometimes, but it reliable enough and fast enough.
I currently also have a cable modem. I've been parking in Austin, TX enough that I keep a spot permanently, paid monthly. So, I have cable internet there, which is vastly faster than any 4G service I've used. If Google fiber makes it there, I'll buy that, too. Obviously, Internet is a priority. I'm not in Austin at the moment, and so using the Virgin hotspot out in the sticks in New Mexico, and it's working OK.
There have also been times when I used my phone as a hotspot. It's on T-Mobile. They made it impossible to do on my plan about a year ago...so, I'm annoyed with T-Mobile (I'd used it as Internet backup for years; my plan didn't change, but they imposed new rules). Haven't changed yet, but may eventually change to a service like Virgin Mobile, Cricket, etc., since I rarely make phone calls. When I'm due for a new phone, I'll look into it.
Service maps are available for all of the carriers and are reasonably accurate. Sprint/Clear claims better service than they provide, T-Mobile claims less good service than they provide (but still have less coverage than Sprint). AT&T outright lies, but has broader coverage than T-Mobile. Verizon I've never had or used, but is reportedly very good...it's just outrageously expensive.
Many RV parks also have Internet, and I occasionally use lack of Internet as a motivator to get me to go out to coffee shops and be social.
It's been very rare that I couldn't get Internet somehow during my travels. I can count them on a couple of hands and I usually knew I was going off the grid for a while and could warn my company co-founder and our one employee.
If you had problems with T-Mobile blocking illicit tethering (I do), a VPN solution or even Hotspot Shield on the phone works wonders. Obviously if you use 200 GB/month this might not be sustainable, but something worth looking into for others.
It's not a big deal. There's a pipe with a quick connect hose on the underside of the rig...the hose goes into a pipe in the ground. There's a valve for grey and black water; you dump black, then grey. It's included in the fees of RV parks, as most have "full hookups" (which means, electric, water, sewer, and maybe cable), or you can pay $5-$10 to dump without spending the night at most RV parks with dump stations. Some cities provide RV dump stations for free to encourage tourism, and some businesses offer them for free to encourage shopping there, mostly in the west and in Canada.
It takes about ten minutes, if you're also filling up the fresh tank. My rig usually is running low on fresh water about the time my grey water tank is full, so it works out reasonably nicely. If I'm trying pretty hard to conserve water, I can go two weeks between visits to the dump station. Otherwise, I dump a little over once a week.
I started out in Mountain View; was paying $2145/month to rent a house. The motorhome lifestyle isn't significantly cheaper, when travelling a lot, but it has a lot of other advantages. At least, for me, the advantages outweigh the negatives.