The Frameless Geodesic Dome I currently live in
I really like this.  I live in the country and I'm currently in a 2400 square foot house but I want to downsize.  I could see having one of these as well as something else like a shipping container or Quonset hut (I live in a hurricane area so I'd need to have something I could ride one out in if necessary -- though I wonder if your design would have similar functionality to the geodesic radar domes in the far north).  Do you have more pictures from when you constructed it?  I'd like to see the individual shapes comprised of the corrugated polystyrene and foam insulation and a close up of how the bolts work.  Where did you buy the large pieces of polystyrene?  I have similar motivations as you, I want to live cheaply and learn new programming.