If you need an engine, you would not want it waving about in the air.
Better under the hull as suggested in a well.

If you want to steer it, you want in effect, an azipod.

Lack of power is relative. 1 or 2 horses will likely give you half
hull speed, unless there is wind and waves against you, in which case,
I would mostly prefer to sail.

So, you want an auxiliary sailboat, or a motor sailer?

Or, an expensive diesel electric drive?

Or, a motor yacht with auxiliary sails?

Terry K