I need a sprayer to do broadleaf weed blanket sprays on lawns, most of my lawns are around 30000 sq ft, with a few larger and a few smaller. Basically I will only use it for doing broadleaf weed and maybe pre-emergent. Otherwise i will be using a backpack sprayer for spot spraying. Does anyone just use a backpack sprayer for this type of use? I don't want to spend a fortune on a spray rig setup if I don't really need one, what do some of you guys think?