The Frameless Geodesic Dome I currently live in
If you want to live in a city, it's not the cost of the house that kills you: it's the dirt.<p>In Seattle, where I live, my property tax statement tells me that my (large, nice) house is worth roughly half as much as the land it sits on.<p>Given that these domes don't float, you still need a place to put 'em.  If your goal is to opt out of the cost of housing - an evil which this blog post expounds upon at length - your first order of business isn't so much "what to live in" but "where is it going to be".