Hello everyone! I am posting this thread to ask opinions for a commercial bid I am doing. I have been in business through one season and have 14 residential properties and 2 commercial properties. This year we are bidding on a local park district with several parks and empty lots. I would just like some ideas on how I should bid the parks-by the acre, hour, sq foot, or if anyone has a better formula. Most of the lots are empty and would probably take no longer than 20 minutes to mow.