I run 2 100 gallon tanks. One for the mix and one for water only. I have ran into a few houses where I needed to use my water. I run 2 pumps on my trailer. I would go with 1 100 gallon tank, and a 65 gallon tank for the mix. I am going to switch out my 100 gal. and buy a 65'er. gives me more space on the trailer.
Legacy, can't wait to see your trailer set up. Im just about to set up my new trailer and thinking about using the side man door as my main door while on job site. Just wondering what plans you have...