in the fall, i will be offering my customers both dethatching and aerating. i have aerated before, but have never dethatched. i don't own either machine, so i rent the basic blue bird. the cost to rent either machine is pretty much the same. How much more should i charge for dethatching over aerating? let's say i charge $100 to aerate a property-how much should i charge to dethatch the same property? i assume after i lift all of the thatch layer up i have to collect all of it w/ the mower?