Ben, welcome to a2k, glad to see an architecture thread here again. I'm a retired land arch, lived in Venice a million years, know the Ain houses as a friend owned one, but on the other hand, they didn't move the walls at least when I was there. I'm don't know how that went in the rest of the neighborhood, which was something like three streets maybe four blocks long.
I have to laugh, as I was reading your post I was revving up to tell you about Ain.. your friend beat me to it.
On moving building units, when I lived in Venice, there was a relatively tall victorian moved onto a corner lot from Boyle Heights, the area just east of downtown LA. Interesting thing to watch.. an engaged owner making a lot of effort.
I've thought myself about possible changes in now deserted subdivisions, especially any with large lots - how to adapt them for better usage, including making some houses multi family, and some of my thoughts had to do with consolidating where the houses were and using the then leftover land for useful shops (what I'd call larder shops) and areas to walk the dog to, get a coffee, etc. Anyway, however pie in the sky, I figured on, yes, move some of the houses. I don't know the economics of that.
I haven't heard the term morphable form but it's a quickly graspable idea, interesting.
We have some old threads here on a2k under the tags architecture, landscape architecture, land use, hope you add more architecture threads.