I'll do one time mowings but I have a minimum service charge of $40. I charge this not only because I'm changing my route but also because I've never mower a home owners yard that was properly cared for prior to me arriving. Most don't typically edge weekly and usually if they're asking me to do it I'm going to have to hit it three or four times with the mower.
As for th dog crap and the situation, I would have called him. I always get a phone number from potential clients and always go over a price before I mow so there aren't any surprises.
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