I think that what you're doing with the natural building is awesome.
It can be cheap,
sustainable, low cost and fun.
I think the biggest drawback is the social aspects.
You can get cheap
land and build your house in the middle of nowhere. Cheap house but bored.
You can try to do that in a town but then you have regulations, higher cost, and you often can't get clay as cheaply.
Have you heard of movements to try to site a couple of cool towns near each other?
Near a smaller college town could work.
I live in the PNW and there is a lot of groove going on but there is also very expensive housing in cities like Portland and Seattle.
If people could have another natural building communiity a few miles away by bike or griesel bus they could have a better social life, play music, adventures, etc.
Have you two heard of people trying to organize natural building communities for better social interaction?
Thanks,
John S
PDX OR