basically really small houses for single or double occupancy, that are ultra efficient, and in many cases very beautifully built!
these are perfect for someone fresh out of school, and looking for a good cheap way to live. Some are mobile, some are stationary, all of them are really cool!
going through the Tiny House Blog there are all sorts of designs, even a few that can be downloaded for free.
In our area, where the RV industry has gone bust lately, perhaps they should be focusing on making low cost, green versions of things like this? just a thought.