While unemployed this last winter I had a fair amount of extra time on my hands. I put together an Excel spreadsheet for estimating mowing times. It would be very easy to add 1 more calculation to the form to multiply your hourly rate by the time estimate, so you could give a bid within seconds of measuring the property. It is in a .xls format so you'd need a computer to input and extract the info. If anyone is interested, drop me a PM or e-mail and I'll send you the file. It's relatively small, so dial-up users can request it with no worries. Remember to include your e-mail address!