I just got started this year and am currently using a 42" riding lawn tractor for my larger accounts and a 24" commercial self propelled push mower for my smaller ones. I plan to get a new commercial walkbehind in the spring, and was wondering if I would be better off to go with a 36", which I could use on all of my lawns, or if I should just get something bigger like a 52" to cut back more time on the larger lawns? Right now I have 12 accounts, 5 are about 1/2 acre, or about 1 1/2 hrs with the rider. 1 is about an acre, 2 hrs 15 min with the rider. The other 6 are small, 30-45 min withe the 24". These times include trimming and blowing, and I plan to grow about 20 accounts for next year, I'm guessing the size ratio will stay about the same. So what do you guys thinkwould save me more time overall, a 36" on all of them, or a 52" on just the larger ones?