Can you post more pics of the weed wiper? That looks like something I could use on the weeds in my perennial peanuts and bahai grass fields for briars, broom sage, and soda apples. I'm guessing you use a fraction of the herbicide a boom sprayer uses? I know the herbicide for soda apples is $100/qt. with an application rate of 8 oz to the acre. Problem is that the soda apples have to be spot sprayed cause they grow in bunches so we just do our best. Something like this you could just do a drive by...