I have a few "old timers" that are willing to pay me hourly to rake by hand there whole yard. I also have a few multiple acre commercial accounts, there is no way in hell im gonna rake..id be there for days, and they would never pay the bill it would create. So my question is what do you guys do, power rake them? Im pretty sure guys around here only power rake every few years. Also will the power rakes damage sprinkler heads?