I get my car washed at this place near my house for $7.75.  I've determined that paying this small price is infinitely better than doing it myself, thus avoiding an hour of wasted time, wet clothes, and a poor wash job*.  But I only go about once a month, and even less frequently during the winter when road salt makes car-washing pointless.  So I have an idea I'm thinking about pitching to my car washer:  Offer a monthly membership program where customers can pay $10 a month to get their cars washed twice a month.  Customers could pay six months or a year up front, that way there's guaranteed income right off the bat.  And it's more income than you'd otherwise get from infrequent car-washers like me.  And it would benefit me because I would be near the place and think well, I already paid for it, so I might as well get my car washed.  Win-win. 

*Plus, Wendy says they most likely have some sort of purification process in place before they dump the waste water in the drain since it's a requirement of all businesses with heavy water usage, unlike my "system" which simply lets the waste water seep back into the ground.  Win-win-win? #business