I have an account that wants me to bid 40 acres of wide open mowing. Basically it is around a large manufacturing plant. I know everyone says there are a lot of variables that go into pricing mowing. But this is just a field wide open. No trees, fences, landscape beds to mow around. No trimming or edging. I would like to base my bid off of one 72" mower. How long in your opinions would this take to mow? Also ball park what is a fair price? Again I know it depends on my market my overhead etc. Just give me an idea. Thanks in advance.