I have been around this in my head a thousand times and always second guess myself. I have always thought best way to spray was w/ a 100-200 gal skid sprayer mounted on a trailer. BUT, I have never done larger size yards. Now, I have a yard that is a little over an acre and have picked up some half acre lots, etc. I have people telling me I'm gonna work myself to death dragging that hose around all day. SOOOO......What is the best ALL AROUND unit for spraying large, small, and everything in-between yards????? Thanks so much and any advice is very much appreciated!!!!!