The ideal “estate” tractor, IMHO, is a Ford 8N. About 25 hp, 3 point hitch, low center of gravity, sheet metal body, ignition and carburator parts are all available at the NAPA store.
One reason why I’d vote against the 8N is the lack of a live PTO. That’s it.
You can ameliorate this issue with an over-running PTO coupler.
It can be very disconcerting for newbies to be brush-hogging along, they get to a fenceline, raise the three point, hit the clutch to slow down and.... the angular momentum in the brush hog keeps the transaxle moving forward at the previous speed.
Other than that issue, I agree that they’re very, very easy to service.
Oh, one other thing on the 9N/2N/8N’s: Don’t put a loader on them. The castings for the crank and tranny can’t take the stresses that well.