The K1322TS makes a great mobile unit. Paired with a Cox Hose Reel it's a great setup to keep tucked away in the van or trailer. The main thing you'll need though is a beefy generator. Kranzle recommends a minimum of 4800W. The K1322TS also has a self priming pump which makes it a good choice for a water tank.
Here's how I would set it up:
Water tank >
STAINLESS SHELF WITH HARDWARE or skip the shelf and just keep it mounted to the floor.
I'd also skip the Piping Package and CR Spotless. You'll want to get an industrial DI filter tank and fill your water tank with that before you head out for the day. Then you'll have good filtered water in the tank at all times with no need to filter on the fly.