For the last five years, Jay Shafer has been making ultra-compact sustainable houses, partly because he doesn't like vacuuming. His company, Tumbleweed Tiny House Company, provides consumers with a variety of kits and ready-made sustainable houses. Shafer even points out that if your house is small enough, you might not have to pay property taxes (depending on where you live). Also, most of Shafer's sustainable houses are completely mobile.
Take Jay's Tiny House tour.