I'm sure this question has been asked many times, but I cant find anything in the SEARCH. I have a general idea that mowing is priced at about $60 an hour for one man. Does this translate into approx. how many sq ft one man does in 1 hour. I know there are a lot of variables, but is there a general number? I would be starting out with a 38" John Deere rider. Any info would be helpful.