I think this is a very cool idea.
http://www.simplesolarhomesteading.com/
We would like to live in a place like this when we come back to Canada. It would only be for a few years while we plan the build for the dream house. We've got some acreage lined up in the Kootenays that belongs to a family member so it would be done on owned land.
Unfortunately I'm aware there are quite a few restrictive laws that can make it difficult. One I know of states any structure more than 10metres X 10metres needs a permit and is subject to strict building codes but a possible loophole is using a trailerbed as a foundation. One idea I had was building several tiny structures like outhouse, kitchen, toolshed, livingroom/bedroom a few meters apart.
These tiny houses don't look hard to build and it's something I would like to do myself but am concerned about the legal minefield I could be entering as well as safety issues.
What says NBR?