Wheelhaus is the original luxury prefab designer, but all of their designs feel cool, never pretentious. The Railcar comes with a built-in deck, which is a perfect space for a barbecue or a hot tub to enjoy the view wherever you park it — whether it’s a mountain range to the beach. The luxury price tag gets you a 400-square-foot living area, stained rustic cedar siding, one bedroom, a bathroom, a private deck, and the option for a mini gas-burning or electric fireplace. Glass line showers, Kohler fixtures, and track lighting for artwork adds to the non-imposing comfort.