People get divorced, relocate for work, relocate for mental health,end up in jail, People end up hating each other, have kids and need space, get a raise a want space, and people die.
How long does the friend structure survive? There will be people moving in and out just like any part of real estate.
Do the original owners turn into landlords and rent out the homes?
There would be an interesting dynamic if the homes were mobile, when you could move to a different friend compound if you wanted to leave.
But again, all of this is solved in trailer parks.
I am -not- being derisive of trailer parks. I am saying that this is a rich person's reinvention of it with some added attributes. Spending time studying the dynamics of a trailer park over time would provide lessons on mistakes not to make, and nifty solutions to problems not yet pondereed.
(Yeah if you can afford a mini house on its own real estate in California these days you are rich)