Trying to do some research into actual productivity numbers. A lot of the ones listed on the manufacturer's website's seem inflated. Maybe we can get some real-world numbers. For this situation we'll use a square 1 acre of flat to gently rolling ground, maybe a ditch on one side. 10-12 tree's to avoid, as well as a house and a garage. Let's say mowing only, no trimming or edging. Please list mower type and size for reference. On my little 48" Z425 this would probably take me about 40-45 minutes.