We installed a drinking water
vending machine several years ago. We have developed a very loyal customer base who do exactly what we had hoped - they buy water and then wash the car. It is not uncommon for one spouse to be getting water while the other is washing the car. Just yesterday, a local cop was in and said that since he needed to get water and wash the car he came to our place even though he had to pass other car washes to get to us. I would do it again and am very happy with the results. It takes very little space and does draw people in who wouldn't otherwise know about us. We get good word of mouth advertising. I can't recommend the company we got our machine from as they seem to have vanished off the planet but the machine is very reliable and looks great.