[MOW ED]

Sprinkler heads are a good tip. One just as important is always ask if ther is an INVISIBLE DOG FENCE buried on the property. I also ask if the neighbors have one. I have never done it but I am sure there are a few guys here have cut them. They only bury that little bugger an inch or so underground. The homeowner installed models have been seen floating on the grass.
My little helpful hint. Oh yes one more thing, its hard work and charge big for it.