i have one of the 14 gal. sprayers that run by electric pump, i use it to spray the orchard, and for weed control. it works well, is very easy to place on a carryall and just spray from the seat of the tractor. have had this for about 8 years, no problems. dont know how much spray you use for your jobs, but theiy also come in a 25 gal tank size. bought mine from northern tool.
alex
alex