Tiny Houses

After seeing the small yellow house video in class I went on youtube and found something called a "tumble-weed" house which is even smaller.  It's designed on a trailer to get around building code and is typically about 100 sq ft.  Theses houses can be moved but aren't designed to be on the road for extended amounts of time.  The idea is to use space more efficiently and decide what you really need and what is just weighing you down.  I like the idea because owners say they have more freedom financially (because its significantly cheaper) and because its less work to maintain.  Additionally it seems like having such a small house would force people to go outside and do things rather than sitting around all day.