My brotherinlaw is looking at a new craftsman with a 26hp kohler with a 54" deck. He mows about 5 acres. I first told him to get a ZTR. He said his wife mows most of the time and she did not want a ZTR. I told him that I could mow my 6 acre yard with my Grasshopper in 2-2.5hrs. He said that the tractor mowers should mow as fast because the deck is only 5" less. I told him that the tractor will not mow at 10-11mph. HE IS SET ON A TRACTOR!!!! He wants to know the speed of this tractor. I told him maybe 5mph. What is your opinion on this mower?