I have also been looking into
memberships. Only reason I am more inclined to do it, I have had several
fleets of vehicles coming through at different times to wash 3-4 vehicles. I also have an Amazon distribution center about 1.5 miles from me and have talked to several of the drivers when they come through.
I believe if mine was to be successful, I would have to go around and sell it to the businesses. Another big customer target for me would be the boaters. There are a couple of big boat launches for the Bayous/Galveston bay within 2 miles from me. Would reach out to the boat shops and try to partner with them somehow, e.g. I would give every new boat purchase 3 months of free washes. It may sound like a risky move but if a boater uses your place for several months straight, they become hooked. I understand you risk abuse of the system, but water/chemicals/electricity is also very cheap. As others have mentioned, I don't believe a sign will sell a
membership.