Do you offer attractions for tourists on the water side? How much does an hour of towing a wakeboard or inflatables cost you? A large motorboat costs a bit and additionally has to consume a substantial amount of fuel.
What if you used the 3bros water go-kart for this purpose? The maximum engine you need is 30HP. It will burn up to 12 liters per hour, depending on the load. Why not to improve the profitability of your business?