Rural areas often host large music festivals and state fairs, which tend to have crummy porta-johns. The rural town where I grew up was packed every summer with

Rural areas often host large music festivals and state fairs, which tend to have crummy porta-johns. The rural town where I grew up was packed every summer with campers, antique collectors, and bike riders, and I'm sure some of them would pay to use a nice toilet for a change. And septic systems aren't limited to just rural areas. Many suburbs and towns have them too.