This might be a bit off the mark as far as this particular tribe goes but the web site Green Living ( tinyurl.com/dynfx2 ) has a great slide show of various configurations of shipping containers arranged in collectives for group living environments. I've not read much about such living situations here in the States but my understanding is that their is an increasing number of intentional communities starting to gain ground in both Europe and parts of South America. Have a look at the link. I think some folks here will find it quite interesting.

Cheers.