These are the recreational vehicles of the water, with wide beams and cabins that cover most of the deck. Inside are private staterooms, a head or two (with shower), a big galley, and eating and entertainment areas. Generally used on calm bodies of water, though some with modified veehulls are found on big rivers and the great lakes. Fiberglass or steel hulls are common. Even the small house boats that start about 30 ft. are spacious; hotel-sized craft range up to the 50s and 60s.