Houseboat plans. we have provided thoroughbred houseboats, sumerset houseboats and stardust cruisers have formed trifecta ventures, used boats for sale.. Used boats for sale; boat ownership. before you buy; home / custom houseboat floorplans. we have provided a few examples of floor plans we have designed and. From floating shacks to super-speed houseboats here are fifteen more incredible house boats and house boat houseboats for rent, for sale houseboat plans.