Cash is the best remember theres no internet fees no debit fees, 15cent every time you swipe. at my lower income washes/Getto the people use
coins more than cash/credit because they have poor credit and cannot get a
credit card and take quarters from there home to wash the car. I have cash and credit. Only way I would justify this only credit cards is if you where in Detroit or somewhere they break in to your wash daily then I would switch over to straight credit cards.
*The Merchants are the people making all the money now and don't have no equipment, no carwash , no headache just swipe and straight profit withdrawal from your account.*