On the surface, Jim Battan's side hustle seems like an American dream: He's made $195,379 in revenue since September 2020 by renting out his amenity-packed backyard pool to over 10,000 people.

But Battan, a 58-year-old IT consultant, says he cautions others against mimicking his side hustle, even though he is Swimply's highest earner out of 25,000 pools in the U.S., Canada, and Australia.