Hey man, you're dealing with the public, the customer is always right. If customers come in ready to pay you $$, anytime is a good time. If it annoys you because they don't always come when you are ready for them, suggest you find another line of work mate. Not trying to be an @$$, but that's the way it is. And I do understand; I did service work for about ten years; hated it. I got out of it..............