Halt...hahah....
We might conserve water by using waterless and rinse free washes but asking a detailer not to wash his car for a month..lol..- good luck with that.
I detail for 4-5 hours straight does that mean my hose is on all the time? It takes 3-4 buckets of water to wash a car with a hose.
Your cause isn't wrong but you might want to conserve water through other means too like fixing leaky pipes, switching off the shower while shampooing, etc..