Compare what kind of house you can get for $400,000 in six markets across the country. The tour begins in the Pittsburgh area, with a country home made from a renovated barn. Next, it's on to Seattle and a home that defines vertical living and making the most of available space. Then, in Detroit, we check out a former lumber warehouse that's been redesigned into modern loft condominiums. Last up is a look at homes in San Diego, Baltimore, and Dover, N.H.