Trying to pull me out of retirement Ron?
I haven't PW'ed in about 4 years. My wife joined the Air Force and we got stationed in northern Texas. Vinyl sided houses, decks, roofs, and new construction brick are things that have little demand here. When I got here only 2 PW's were listed. I thought I would clean up. Now I know why there were only 2 listed. My rig has sat for 4 years. I refuse to sell it.
Anyhow, I switched from DI water to RO water. The DI water is nice because it is on demand. The RO water is way cheaper but you need to have a storage tank to make water or have it flow into the tank on your rig. The other downside is having to haul full tanks. I think the ideal situation would be to use RO water when you can and have DI tanks for back up if you run out of RO. One more thing is that with RO water I wouldn't yell at the guys as much for wasting some. Now with DI water I was an A*****E. I didn't like waste because the price of exchanging DI tanks was rising. I also would use RO water for the whole wash and not just the final rinse. FYI I did a full hand wash and not just a DI/RO rinse and dry.