I have a questions that seems remedial, but what is the best way to calculate how long it will take to cut a place of about 2 acres? Even if the property is 2 acres, you have to take out the house, driveway and pool which leaves you with maybe 1 1/2. If there are alot of trees, then maybe only an acre. Assuming you are using a 60" ztr, how do you know how long and as a result how much to charge? Maybe figure out the square footage ? If 1 acre = 43,560 sq.ft., then 1 1/2 acres = 65,340 A 60" ztr with overlapping cuts approx. 54" at an average speed of 7 mph What is the right way?