I had a customer that used to tell me that I cut her lawn to quickly and that the price should be lower. If remember correctly, I said, "If I took dancing lessons I would do a little dance for you, but your $20 isn't a drop in the bucket to pay for my machinery." Needless to say she found another sucker to cut it probably for cheaper. I believe I red in the paper around that same time, LANDSCAPER JUMPS OFF BRIDGE (kiddin of course about the bridge part), but I now know, now that as I grow older in the business that customers like that really ain't worth the trouble.
Best Wishes