In a concession to modern times and marinas that bill by the foot, the bowsprit would be easily retractable, with bobstay and shrouds tightened by cascading tackles for ease and convenience in setting up. A heavy hull with the beam carried well forward for seaworthyness and inside volume would be too large for an outboard engine, so there would have to be one inside. There is nothing worse, though, than cutting out the back end of the keel so you can drag a huge prop through the water: I would seriously look into a diesel-electric setup, with one engine powering two folding propellers, one each side of the keel, or two smaller diesels, maybe 20-ish HP each. Either way, the engine room, placed aft under a 10X8 foot pilothouse, would be hermetically sealed from the rest of the boat. Any through-hulls would be placed there, to minimize the risk of sinking, and there would be another collision bulkhead forward, dividing an ample sail/chain/tool/utility locker from the living area of the boat, just like Ganymede has.