Kw per hull, would that be close to 10 HP in gasoline?
I am thinking about one 9.9 Yamaha (2-stroke, simple and reliable) that I have stored in my shed. The downside is, no el. start, no battery charging... but the price is right.
I am however still contemplating merits of lowering the ceiling (or, should I call it upper deck?).
As I am the tallest in my household at 1.6, Bernd's;s 1.9 headroom is a bit wasted. So, theoretically, I could both drop the center of gravity and reduce the windage and for sure will hurt the resale value (which is low anyway as it is a homebuild).