I just had a buddy have to source a used transmission for his 3130 Kubota because parts are nla. I had a cousin quit a very good paying engineering job with case/new holland because they wanted him to design parts that would fail and need service prematurely. They designed the failure right into the tractor, and had to do so to keep up with other manufacturers doing the same sort of thing. It’s a common practice in manufacturing these days.
Is a case/new holland (rebadged LS) any worse than a Deere, Kubota, Kioti, etc.? Nah, they all turn out the occasional polished turd.
But let’s get back to the point of the thread which was to help the OP pick a tractor to fit his needs shall we?
@Jusgunn3 what others have said is very true. You pick the dealer not necessarily the tractor. The three largest tractor brands are currently Kubota, John Deere, and Kioti. Those brands are going to give you the best shot at finding a good dealer near you. Near you is an important point. Big tractors take some effort to haul in for service.
From what you’ve said you need to do on your property you should look at a 50+ hp machine. Get the rear tires loaded with rim guard or similar right off the bat.
When you go to the dealer start at the service department. Talk those guys up before the sales guys get a hold of you. See if they are friendly and helpful. Because it’s the service department that will be taking care of you once you spend you hard earned money.
Are you cutting hay in your pastures? Do you have a lot of obstacles to mow around or is it fairly wide open?