hi i am looking to start my own wfp business. i know the basics of what i need ie: van, tank in van, resin filter(large 11 i think?), pump, controller unit, battery, hose & reel and couple gardiner poles. not sure on how go about getting water pure enough. thought of having 2 more large resin filters at home to fill either containers or larger tank to then transfer to van? would this make my water pure enough (0ppm)? any ideas to make this easier or quicker would be most appreciated. thank you.