“The main idea is that you can connect and expand,” says architect Jerry Koza. “You can live in three modules, then add another for a studio or a meeting room. As lives change, after five or six years on the river, or, say, your child leaves home, you can move it into the mountains near the slopes. It’s about freedom.”  Photo 2 of 7 in Floating Prefab Concept Rethinks the Houseboat