So, what do I have to do? This isn't a typical drive-though. Do I have to finish vacuuming within 4 min? There's nothing to dry the cars with, correct?

Our automatic wash will dry your car or you can purchase towels from our vending machine to dry your vehicle.

They do have an automatic wash in one of the stalls as well. I'm not sure if it dries the car though. I have only used the self wash stalls and vacuum the car at home using a very long power cord extension.

There is one automatic drive through wash the rest are do-it-yourself high-pressure hose stalls. There are vacuum stations near the street and hand drying areas in the driveway. Hand towels for sale in vending machines