I am preparing a bid for an 11 acre lot with about 8 or 9 acres of grass to be cut every 8 to 10 days. I don't have the equipment, but fortunately they have a ford tractor with a 72" Woods deck on it. The lot is a little hilly but not bad. There is under 30 mins of trimming to be done and a little blowing. This is my first large job and I am not sure what to charge. I was thinking I would be able to cut steady at 7 or 8 miles per hour and that the whole job should take maybe just over three hours. How much should I charge?