Sweet. Nice job. Are you going to have both sprayers on a skid, or are you going to separate them so you can carry either one or both in the bed?
The Hypro pump will probably be suited for about 1.5 gal per minute--or about 1 gal per 1000 sqft. Suited for herbicides.
I have never done much liquid insecticide--so not sure about the second setup. However, if you plan to spray trees--anything over 20 feet will probably need a bigger pump and motor. However...a 50 gal tank will run out very quick. At 4 gallons per minute---you have 12 minutes. An extra tank would be helpful, if you actually need 4 gals per minute for insecticide.