yes! i think it was so uninhabited because the people just moved on in their lives and didn't stay. oftentimes, perhaps in this case, too, finances are a big issue. how do people make a living rurally? how can we milk goats and garden and make a living? i think what you say about it being people's dream, even if for 6 months is spot on... many people spent a lot of time and energy building these houses... and then maybe that was enough for them...
i think they were able to produce a lot of their own needs, but weren't totally self sufficient. still a magnificent, inspiring place though!