Found the link to the products. Thanks.
I believe their estimates of how many gallons of H2O used per wash is a bit on the high side. I can wash and rinse my cars using maybe less than 25 gallons. But I don't leave the hose running while wiping down the car. I only use about a half cup of vinegar in five gallons of water to wash the car, give it a quick rinse and then apply wax when the time comes.
I also have a clay bar that I use annually to prep for waxing my cars. I prefer Malm's waxes and polishes.
http://www.malms.com/ They have the best Brazilian Carnuba on the market...per their marketing. I happen to agree. A little bit goes a long way. Darn stuff is expensive, but because it doesn't take a lot, it doesn't hurt quite as much.
I've used Plexus on my motorcycles for years. The price has doubled recently, so I've been looking for other alternatives. I used to buy a large container for 9 bucks, now it is selling for over 20 at Road Rider, in San Jose. It works great, but for that price it has me looking for something else again for the quick detail. When in a pinch, I'll use McGuire's Ultra Detail.