I'm bidding on a large sports field, primarily used for soccer, to maintain through the season. They require the grass to be maintained at a 3" cutting height, and mowed weekly. The only trimming required is around approx. 8 goal posts. Everything else is wide open cutting. The property is 13-14 acres of lawn. What do you think you would charge? I'm trying to figure this out and keep going round and round. Thanks to anyone that provides their input.