Look for an array of houseboat plans and kits so you can design your own floating home! search for small, multi-purpose houseboat plans and kits at bateau.. "coolwater" – a $70 shanty boat!! well, maybe it might cost a little more in today’s money. these plans even detail how to make a built in wooden bilge pump!. Houseboat plans! build the houseboat of your dreams! above is a photo of our 16 foot long "aqua casa 16"! this boat is fully trailerable. you can take this boat.