I think the toilet business is only a good one on a large scale anyway: mostly due to fixed costs for paying the cleaning staff no matter if you operate a restroom with 1 or 20 seats.

BTW: I'm not sure about the neighbor. As I would only ask for a voluntary 50 Ct. there's no reason to prefer the other guys toilet. I assume my toilet would be preferred because it's cleaner (cause I'd pay more to my cleaning staff).