I was shopping at Tractor Supply Company agricultural store. I bought an agitation nozzle and some parts for the internal agitation system I am putting together for my Permagreen. The 2 gal per minute Flo Jet pump was about $88.00, supposedly capable of 60 pounds pressure, (but pumps always exaggerate--I suspect that means 2 gal per min at 5 pounds pressure OR...a tenth gal per minute at 60 pounds pressure). According to label the pump draws 10 amps. That is a lot of current, I think. You need a good battery. The 3.5 gal per minute pump cost more and drew 11 amps. Plain 2,4-D amine was about $14.95, and Trimec was $21.25. They had lots of seed in 50 pound bags, but I thought the quality was low. The annual rye, per rye, KBG blend was cheapest at about 50 dollars.