@xj9 mirco/nano grids have come up before:
A major reason that "tinyhomes" often have wheels is it shifts it into a different legislative category, and the paperwork becomes much simpler or disappears all together.
Of course there are also advantages to being able to move something, having an easily movable format (such as shipping container). Then you could have a community that grew easily, even moving the entire thing to a new location.
With a big enough plastic sheet and a fan, you can just blow air into it and get an instant dome, how big the fan needs to be depends on the leaks of course. hmm, leaks would scale with respect to surface area but volume is the cube of that, hmm... A mobile home inside a bubble would be very solarpunk I think.