Picking up some large area treatment customers (200,000 sqft+). What is a good unit to do this. I don't care if I need a separate rig for liquid and granular, just wan't something good...easy to calibrate, bulletproof, etc. Some of the bigger companies around here run stuff with 16 to 20 foot booms with foam and 75 gal tanks, but I've never seen a brand name. Maybe they built them.