David, Yes, measure the turf, linear feet for edging/trimming. Each piece of equipment, for example, should have a factor associated with how much it can accomplish with competent operator. For 1,500 SF of turf, lokely will use push mower. How long will it take to mow that with the push mower. How long do your factors tell you it will take to perform each operation? Have factors for EVERYTHING. Then, take into account cost of using equipment, labor rate, time to do the work. Add it all up and then determine what profit margin you want to sell the work at. First step is a cost factor for each piece of equipment and materials.