I did a quick search and couldn't find any solid answers.
For you mobile guys is a water tank necessary? Do most of you have one? Or do you guys use clients water, or just ONR?
I can see using a tank if cleaning cars at commercial properties such as a business, but I can also see ONR...
I don't post on here very much, I read a lot more of the information and check out a lot of the work that you guy's have done. I have learned a lot from this site and have done basic details to my own cars and a couple friends cars.
Currently I'm writing out a small plan and wish to do this...