And like I said, I have no idea what a few tanning salons would bring in. Maybe a lot. Maybe not. He is obviously splitting it between him and the other co-owner and it sounds like it is a francise so their is the francise fee and their cut of the earnings (if any).
Just doesn't seem like a huge money maker to me. Just an easy low cost way to get into your own business. Most likely the appealing part for many.