It depends what it is. I have 25/25 fiber at home for practically nothing (~70 USD a month) but I can only go so far even with a UPS. If I loose power for too long or my internet goes down I have no backup which I would have at a co-location facility.
If those circumstances occur, what would you be serving that can't afford to go offline for a couple days?
It's important to have an answer to that question, rather than to assume that being offline when your home internet is down is inherently a problem. You can safely estimate using "X nines will cost X digits per month":
1 nines, 36.5 days/year downtime is $#/month. (openwifi tier)
2 nines, 3.65 days/year downtime is $##/month. (residential tier)
4 nines, 1 hour/year downtime, is $####/month. (datacenter tier)
5 nines, 5 minutes/year downtime, is $#####/month. (carrier tier)
Speaking from experience, it's both important to decide which 'nines' you require before you invest in making things more resilient — and it's important to be able to say things to yourself like, for example, "I don't care if it's down 4 days per year, so I won't spend more than $##/month on hosting it".
What does 25/25 mean here? Gbps feels high for the home, but Mbps feels insanely expensive at that rate. (And also I didn't know they did fiber that slow, it's really only available in 1 Gbps and sometimes 500 Mbps here)
I don't see why 25Gbps symmetric would be so surprising. My current ISP Ziply Fiber offers 100Mbps, 300Mbps, 1Gbps, 2Gbps, 5Gbps, 10Gbps, and 50Gbps (all of them symmetric) in most of their service areas. I’m sure there are other providers with similar offerings, in some parts of the country. My previous ISP, Sonic.net, offers speeds up to 10Gbps. The reported price is pretty nice though.
Damn, that sounds nice, the fiber in Switzerland linked to in other comment.
Though the small cost is probably overshadowed by the large infra costs at home. So now you need a 25Gbp/s router, together with the rest of topology like qsfp+ switches, and then actually computers with >= 25Gb/s nics to make use of it. And then all the appropriate cooling for it. It’s starting to sound a lot like a home data center :P
You can get 25G switches/router for not much nowadays, check Mikrotik. Throw a couple Intel NICs from ebay in your machines' PCIe ports and really it's not that much of a deal.
It's always a surprise to me how expensive internet access can be in the US. Here in France 1Gb/700Mb fiber connection costs 30€/month (and this is without commitment and includes TV stuff - "more than 180 channels" whatever that means, and landline phone)
The EU invested pretty heavily into making sure even very remote parts of Europe, like northern Finland, have great Internet. I was very pleasantly surprised when I was able to work from home at the in-laws'!
Because of these new subsidised fiber deployments, it's not uncommon anymore for rural/semi-rural areas to have better connectivity than urban or sub-urban areas, which is bit awkward.
Internet speeds and prices are all over the place in the US. I pay $60 per month for 1Gb synchronous fiber (which really performs at 1.2 synchronous, yay me) at my house and $60 per month for 500/30 cable internet at my rental. Two different areas three postal codes apart with different vendors, prices, and products (even when the vendor is available in both).
The way we sliced up space for utilities (lots of legal shared monopolies/guided capitalism) and their desire to build the last mile in their area leads to many different prices and products within a walkable distance. Before that 500/30 service showed up the best we had was unreliable 200/15 from another provider.
and it varies widely. I pay $170 a month for 30mbps down and 15 up lmao and I have 2 options to choose from who have the exact same service for the exact same price. Telecoms in the US is beyond horrifyingly bad.