A few of my customers have called back with questions about my new Service Agreement. I have 3 methods they can choose to pay with. 7, 9, or 12 equal monthly payments. Their concerns were "well what if it rains and you skip a week? What if it is dry and doesn't need it. What if you don't mow all 28 times?" I put a clause in the agreement that says something to the affect that if I do not meet all 28 scheduled mowing, they will be reinbursed with money, or in the form of credit towards other services. They seem to just want to pay monthly as services are performed. Should I add an option in there that says "Pay monthly as services are performed" or should I stick to the monly payment plans?