If you’re willing to sacrifice space for a super-low price tag in your search for modular homes under $10K, the K3 by KitHaus is an option. It’s adaptable as a backyard studio, home office, pool house, or play room, to name a few options. Its exterior is clad in corrugated galvalume or smooth, natural cement board with corrugated roofing, and floors are natural hardwood or finished plywood.