a good ball park is, you want 7 hp for every ft of mower, 5 ft mower, 35 hp, then it will run thru things NOT taxing it
yes smaller HP can do it, but it has to run harder to do so
60 acres, I would want a MIN of about 75 HP if it was me, and a decent mower to boot
but good luck finding one for under 12k in decent shape!
so with that I'd buy the biggest one in decent shape you can find!
That or just pay someone to mow for you, might be cheaper, as a BIGGER tractor mower can knock it out in a shorter time and till you spend 12 k, that pays for a LOT of mowing and food plot work!
NO up keep and NO maintenance to worry about!
unless you have a LOT of time to kill, its going to be long hrs mowing 60 acres with a 6-7 ft mower on a 45 hp or so tractor, or even more on a smaller HP tractor and a smaller mower!
for you!
as thats a LOT of passes on a 60 acre field!!
tractors are like gun safe's
its never big enough!