39 Mark V Designs 39 foot outboard powered Sharpie houseboat. I started out with a simple flat-bottomed sharpie hull. The advantages of a sharpie are mainly shallow draft and simple construction. There are numerous disadvantages, though.
Sharpies pound in a head sea, and they have steering problems in some conditions.
Another advantage of a centerboard is that it can be used as a shallow water depthsounder. The bottom is 8' wide from about midships to the stern. The sides flare out from the bow toward midships, and then tumble home toward the stern, making a nice sweeping shearline. There will be room on top for a nice 12' dinghy and plenty of solar panels. The mast will be easy to lower for bridges.