I would buy 2-4 units of this:
https://www.alibaba.com/product-detail/High-Quality-Water-Sport-Fishing-100_1600627394605.html?
(maybe different model, but same kind of transparent boat"
Then I rent them. Of course, I’d still need a life jacket and other safety gear for this. Then there’s the boat trailer, but I can’t get one for 1,000$ right now. That would exceed the budget, but I was thinking of buying an old one and restoring it.
I’m sure I’d find tenants pretty quickly. I believe I could potentially recoup the investment within a year. After that, it would be a profit.
Perhaps someone will pick up on this tip of mine and invest in something like this somewhere in the world.