I'd look for a used Kubota MX5100 with FEL and 4wd. You can find decent ones LESS than the upper end of your budget. Buying used is also a benefit as you can use the machine for a few months and confirm that it's what you need. If you find you need something else, you can easily sell it for what you paid and look elsewhere. 80 acres of land is a good bit even for a 50hp machine. The only reason to be looking at anything less than a 50hp machine is if you're going to be doing maintenance on said property SOLELY! The MX is a great balance of size and capability. The next size up begins to grow in size much quicker.
The MX5100 is a capable machine that can lift 2500lbs at the pin and just under that @ 24" behind lift point on the 3pt hitch. Going with anything smaller means it will be doing that much more work to get the same task accomplished, and IT DOES add up. We've used a K
L3800 on a 60ac property for improvement and the machine has clearly had a hard life, and cannot do everything that's needed. When performing loader work, 4wd makes a night and day difference. It also provides additional traction that will keep the tractor moving when a 2wd will stall out.
Also, listen to the regular members here. They will not always agree on everything especially when it comes to brand, but what is always agreed on is minimum machine capabilities. As you knock out tasks on your property you will begin to see even bigger ones and will quickly question the size of the machine. A lot of people see a task and think it's within a smaller machines capability and sometimes make excuses to further the idea....but remember, you can dig a pool with a spade shovel.
It's nice to have a neighbor with larger machines that can be used, but don't use that as an excuse to not get the size machine you need for most of your tasks. Do not go out and buy a new machine until you get some seat time in with a used machine unless you have money to burn. Purchasing a used machine is the easiest way to ascertain what you need.
