We use a 60" tiller all the time and it seem to work fine (well it does for a bit); however, it comes with a price tag.....And a similar one for at least two of us who use our boomers in vineyards. When you abuse the tractor a bit it is OK, but use them hard for a couple of seasons (about 750 hours for us) and the pto goes south for the winter, that little experience is easy to fix, and comes with a $1,100.00 price tag.....
So, if it is light occassional use I'd say OK, but use it hard and there is a cost down the road.
While most here won't put the kind of hours on their boomers that we do it still adds up.
The last time we dropped a boomer off for this little operation the mechanic cheerfully chimed in that he'd see us in 700 hrs.
I bought a higher HP tractor to abuse and don't have the problem.