Kim at Large Family Logistics shares an incredible story from a family she met at camp. They bought an old school building in which to live. Someone in my hometown did this with the WPA-era post office, but a school building is even cooler. Brings a whole new meaning to the concept of a "home gym."
You might also want to check out 100 Acre Wood's series on low-cost housing, if you haven't already found it through the Festival of Frugality.