Right now I have about 22 customers and mow about 25-28 a week, from 2x a week customers and people that call for one time only. Next year I am hoping to add another 8 customers or so. I currently have a 48" walkbehind belt drive with a sulky. It takes me about 15-25 minutes to mow a lawn depending on the size. And then about 5-8 to trim and then 3-5 to blow off. I am in the market for a used mower. I am not sure what is the best style mower and size is. My lawns average from .3 acre to .8 acre. I have used a ztr and like them very much however I find it takes longer to turn around b/c you have to do a 3 point turn, unlike a walk behind. I also like them b/c they have a very quick, fast, and easy height adjustment for the cutting height. The reason's I like the w/b's are because they handle hills a little better. Don't tear up turf as much espically in the spring. Do you think a 52 w/b hydo, 52 ztr, or 61 ztr would serve me the best?