Car Wash a good investment?

[Dave Rav]

Hey BP members!   I was toying with the idea (loosely) of investing in a car wash.  There are two for sale in my vicinity.  One has 5 bays, one of which is full service.

Question:  does anyone have experience with a car wash?  If so, what can you tell me about one - some detailed questions below:

-what constitutes a good deal? (number of bays, cost per bay) (location, obviously)

- how do you analyze one?

- what kind of monthly cashflow is considered "good" (net)?

- how much hassle is maintaining the equipment?

Thanks for any feedback you can provide!