$20K for one of those?
Look like about $2K of wood, maybe another 2k for windows and roofing and fixtures
I’ll send you a kit for $10K
Couple weeks back I was describing this concept to a friend, who was floored by the idea of building a decent home for $10,000 for each kid (of which he has 8, and I have 2).
This guy HAS made a small off-grid home for around $2,000:
http://www.simplesolarhomesteading.com/
More info on his Yahoo group, too:
http://groups.yahoo.com/group/simplesolarhomesteading/