Ive been told in a lot if cases this is virtually impossible due to cost and structural constraints of office construction vs residential... notably ceiling heights, plumbing and floor plans are poorly designed for residential conversion.
England's experience with it should probably serve as a warning too. We had a law change that meant office blocks could be converted to housing without planning permission. Having lived in 1 that was converted into studio flats at the higher end of the market I think they really become houses of last resort, some of the units in the UK ones ended up being smaller than a single car garage. Obviously there are chances for better conversions if the country has housing standards that are enforced but even the ceiling height, like you say, gets oppressive after a few months.
So, I know you were joking but this idea has more than a little validity. In my vision, it would be a small group of families that would meditate daily together, and collaborate on chores and child-raising, and (this part I haven't figured out yet) work on the same project, or perhaps WFH on software-like things. Ideally there would be daycare, gardening, and some sort of exercise (yoga) involved. I mean, yeah its easy to imagine how such a thing could go horribly wrong - bad actors taking advantage, cult-like groupthink, etc - but its also easy to imagine what it would be like with the right mix of people being good to each other. Maybe call it a "Sci Fi Kibbutz" or something.
What you describe is basically an intentional community with a revenue stream from a software product. Something I'm interested in, but unsure how to make it work.
There are intentional communities that support themselves with their own, often agriculture based, products sold on the open market. Plus the usual homesteading.
The skills needed for this kind of work are not highly specialized and in general not well paid, therefore levelling the playing field for everyone in the group.
I think the opportunity cost for IT professionals building a SaaS to support the community is a lot higher, and while I would love to see that work, the chances of key community members dropping out to make more money for themselves is fairly high. I'm not sure if a simple time based system for everyone involved is fair, given the high upfront investment to get the skills needed for IT work.
