This is how I would do a larger mow only operation. Base of min wage. Then pay each guy so much per stop based on the gross of that one property. If any call backs that needs to be on them but the min wage clock is running. You will need to do some spot checks to be sure they are on their A game but you could use a system like this and it would work for most operations. The reason I said min wage on the clock is because they should be getting that by law. They can choose to make more if they want to and in the mean time they could do more with less equipment while keeping the quality up. You also wouldn't have to worry to much about overtime in this setup as per stop rate should be high enough that they would make more on it than on min wage plus overtime. Basicly they are guaranteed any hours on min wage but could make more on a per stop basis if they work efficently.
I've never been skydiving, but I have zoomed-in on Google Earth really fast.