My favourite blog at the moment might be just about coming to an end. "Little yellow door" has been following the exploits of a woman who has been building a house on a trailer for the past 18 months. This has been a really good story, full of all sorts of good stuff about such projects. But the house is now just about finished and she has been travelling about in it. And all for about $16k apparently.
Most impressive http://littleyellowdoor.wordpress.com/