I have about 100 accounts that we spray for weeds. I have been using a very used spray rig which has a 50 gallon tank, needless to say, we have to stop and refill way too much. Most of my lawns range from 5000 sq ft, to 15,000 sq ft. I want a nice rig, possibly with two separate tanks to be mounted on a truck, I also want the horsepower to use a tree gun. Any photos, suggestions and price ranges to expect are appreciated.