People all over the nation (and many places abroad) are opting against or giving up their unnecessarily huge houses (and mortgage payments) to be able to live a debt free and sustainable lifestyle.
Now my take on it is a little different than what the people at the link below have done, but not by much. I like the idea of smaller, easily maintained domiciles, however I think the below 100 sq. ft. cabins on trailers would be too much of a stretch for me (although I wouldn't require much more.)
But have a look at what the Rowdy Kittens have done with their Tiny House, you will be amazed!