I can do about 7-9 yards a day with a 21'' but the grass only grows good for about 6-7 months here then it slows down to about 50 percent in October and November and then probably 30 percent growth up until march. I average about $30/yard cause some people pay $25 and some pay $40. I know their are other jobs besides mowing that I'm not including like bush trimming, but usually that just ends up getting in the way and I end up making less money cause that kind of thing takes longer then it interferes with my mowing. Maybe it's just cause I'm using a 21'' that's slowing me down. What do you guys think? I prefer to stay solo cause it keeps it simple. I see the crews with the big mowers knock out the mowing in like 8-10 minutes where it take me anywhere from 15-30 with the 21. what do you guys think?