That's a lot of pumpin"...
They are good little pumps, but any similar that I have used will not transfer that much. Especially if it has to draw it up a few feet out of a drum. I guess GPM is mostly a matter of what is driving it. That's about the same rating as my 3/4HP well pump at 0ft pick up.
I have used all sorts of pumps for the hops field. Any continuase pumping for say 15min or longer use a 110V rotary pump, they last same as the 12V I used with the wind generator.