DA -- If your lawns are only 5000 -6000 s/f, buy a Ground Logic (unless you have larger accounts or hills, slopes).
RE: ZTR units >> I call B.S.
Any ZTR owner's manual says DANGER:
Keep both hands on steering controls at all times
Do Not operate on slopes when grass is wet
Do Not operate near drop-offs or near water
Do Not operate on slopes greater that 15 degrees
Reduce speed and use Extreme caution on slopes
Avoid sudden turns
I've tried ZTR spreader/sprayers many times. We even drove 500 miles to demo all sizes. I have operated ZTR units for many years (hundreds of hours). Latest being a brand new Exmark stand-on aerator.
I always try to buy the best/most productive machine. I don't need a new truck -- just need equipment that will make me the most money.
DA -- you know what we run. Don't even have to mention the name. Good luck my friend. GO HAWKS!
Proud subscriber of TURF Magazine. (thanks Ron)