Hi, I'm new in the lawncare business and am thinking about buying the 48" turf tracer hp. Most of the yards in my area are anywhere from 1/4 to 3/4 acres with some of the larger lot subdivisions being 1 to 2 acres. I'm wandering if the 48" is a good size. Also later on I would like to buy a Lazer Z and was wandering about the difference in the 60" and 72" as far as cutting yards that are 2+ acres. Is the 72" too big?