Still a bit back and forth on the backpack vs push type sprayer..... (For reference, looking to enter the fert/squirt market this season, goal of 6-10 small resi lawns 1st season, no big commercial) I am strongly looking at the 4 gallon Shurflo backpack...for around $150 bucks can get a nice outfit capable of spot spraying anything and broadcasting small yards. The only thing I wonder about is having to refill so much. With a sample rate of 1.5 oz/1 gallon/1k sq ft, I would only be able to cover 4k sq ft then I would have to refill. (More coverage of course for spot spray). I am planning on buying a 30-50 gallon nurse tank with hose spicket for refill water regardless. Some of the ground driven pushers hold up to 6 gallons of mix or so. Examples are the new Earthway push sprayer or the Synergy. I can see productivity going up with these units over a backpack...BUT how productive do I need to be with only 10 lawns to work??? $300-$500 should take these units. No guys, I am not looking at a skid now. Too much money and not worth it this season with the small amount of biz I am expecting. Perhaps in future seasons.... What do you guys think about the backpack vs. the pusher-type for herb. apps on small resi's of a limited number?