"Cohousing" was the term for this 10-20 years ago. I haven't heard much about it since, but there was a small movement towards exactly that concept a while back. It may be worth researching it to see where it lies today.
Oh, trust me, I have researched "co-housing" and similar concepts. The missing link seems to be that there's a clear advantage in being able to bring together hundreds of people, and "optimize" the logistics and the construction of the site. And so far, very few have succeeded in doing so.
