Earlier quoted context omitted.
If you live in a place where roads are salted, washing your car is generally recommended to reduce rusting and paint damage. I don't go to the car wash often and I only use the one at my local gas station, but it's rare that I go there and there aren't already at least two cars in line. And I live in a very low population density area. At 1 car every 14 minutes on average, a single bay will easily clear $1,000/day of…
If any of the fancy new car washes in my town were only clearing $1k/day, they'd be folding shop pretty quickly. I don't know where you live, but the wash by me (JetSplash) does between 500-1000 cars a day at over $20 a pop. So you're off by a magnitude or more.
However my neighbor used to own a chain of car washes in the suburbs and going by his 11,000 sq-ft house, I'm guessing it was pretty profitable!