What do you do with a McMansion that nobody wants? I’m serious. There are a bunch of 4,000 sq. ft. (and larger) houses out there that were quite appropriate for a time of growing families, big paychecks and two SUVs in the driveway. For all I know, there are lots of families who still love their super-sized abodes and wouldn’t trade them for anything. But I’ve seen a couple of stories about how much these castles cost to heat in the winter and cool in the summer, and to clean all year long. If people don’t want to pay to heat a place, and cool it, and make the payments on it, they move out and find a bungalow of manageable size. Then what happens to the big one?