First let me set my questions up with a little background info. I only do residential maintenance and have never done commercial property maintenance for mowing, fert or WC and have a couple questions. I have calculated my costs per 1000 sf for Escalade which is my weed control product this season. So far I have had great success with this product on smaller properties. Today a neighbor approached me about a one time blanket application of WC at his cousins factory which is badly overrun with weeds. He maintains this property and I would be doing this a favor. It is about an acre of grass and I quoted $130.00 per acre per application. I realize this could blow up in my face since you shouldnt work for friends or family but..... For the guys that do commercial do you charge a little more for commercial due to the deeper pockets or charge the same for residential / commercial, regardless? If the first blanket application doesn't provide 100% kill of the weeds how do you retreat the area? Spot treatment or another blanket application. I agree that this is dependant on how many residual weeds are left. but for arguments sake lets agree that there are a couple weeds every 1000 sf that werent killed with the first application. Just enough to make spot treatment a pain in the but. How would you charge for the repeat application? Smaller properties are easier because you can spot treat them efficiently, but larger properties may be more difficult to do that way. I would charge the same for a second blanket application due to the ammount of product applied and associated costs. I could reduce this price slightly due to my profit margin but should I? If I get the job should I require a contract for this one time application before starting?