This is a complicated question. The 2040 looks like a good deal and it's a very capable tractor. However, if the tach has been replaced and the hours are just what the seller says, you're just trusting a stranger.
My concern is whether you are looking at your future needs. You don't need nearly that much tractor to bushhog 10 acres. You're only going to cut it a few times a year. Most people in your situation will find a loader (and probably forks) their most valuable implement. Without knowing the details of your property, I would prefer a 4WD tractor with loader in the 30 HP range.