What should I check before buying a self-serve car wash?

A self-serve wash has no attendants and no line of cars to count at the door, which makes it look simple. The questions are different from those for an automatic tunnel. The business runs on collection systems, equipment that survives public use, and an owner who quietly does a lot of the work. Records tell you how much.

Collection records

Ask how each payment type is collected: coin boxes, card readers and app payments. Request the collection logs, the card processor statements and the bank deposits, then compare them. Ask who counts the coins and who has keys. Cash businesses need clear controls, and a buyer can only trust the numbers if the records line up.

Bay-by-bay use and downtime

Ask for revenue by bay, by month if the system tracks it. A bay that is often out of service, or a bay nobody uses, tells you something. Ask about vandalism, break-ins, frozen lines and cold-weather closures, and what repairs or insurance claims followed. Visit at different times and in different weather if you can. Ask the seller for photographs of past damage and the repair records that go with them, so you can see how often it happens.

The owner’s real hours

Someone restocks soap, clears drains, cleans bays, fixes coin mechanisms and answers calls. Ask the seller who does it and how long it takes each week. Ask them to keep a simple log for a few weeks so the answer is based on real days, not memory. If a family member does it unpaid, plan for the cost of replacing that time. The car wash equipment questions cover the machines themselves.