If this is done with one mower, help me understand cuz the math ain't jibing in my head. If your average cutting speed in 5 mph then you cover ( 5 times 5,280, zero, zero, carry your 4 ---now divide by 60 ) equal 440 feet per min. With a 5ft deck that's 2200 sq ft/min. Let's see, 2200 will go into 43,560,,, I think 19.8 times so, if I ciphered this correctly, it'd take a bit shy of 20 min to just cut at 5 mph. Then you got to trim and blow and make the place look real nice. It looks to me like you'd have to several hands and show enough be high steppin to do an acre in 20 min.