I would say, like Soundguy, a minimum of 50hp. Probably 65-75hp would be better.
Are you dead set on a new tractor? I don't know exactly where Crestview is, but I bet there are literally hundreds, if not thousands, of 50 to 90hp tractors for sale used within 100 miles of you. Over the last 35 years I have bought at least 30 used farm tractors, mostly in the 50-75hp range, and I have been burned exactly once. I knew better than to buy the one I got burned on. Most of the tractors were sold for as much as or more than I paid for them, several after 3 or 4 years of use. Most of these were Ford, New Holland, or Massey Ferguson tractors.
You say you "need" 4wd and a loader. They are both nice things to have, and if you ever figure to handle any hay, the loader is almost a must. I have seen several new tractor owners literally destroy a good tractor using a front loader to clear land. The tractors nor the loaders are meant for this kind of work. Hire somebody with a backhoe to come in and do it. I had a Kubota
M6800 with 4wd and loader. I started trying to clear some light brush, privet and scrub oak mostly. After a couple of hours, I saw that I would be much better off to call my friend with his backhoe. Paid him about $1000 and figured I was much better off.
I realize loaders are very handy and are useful for much more than land clearing. I'll give you a little perspective on the weight issue and loaders. I owned both the Kubota
M6800 4wd and a NH 6640 2wd with loader. I think the Kubota was rated at around 62-65 hp and the NH at about 75hp. I could pick up one of my 1200 lb bales on the loader with the NH, without a bale on the rear, and have no problems. If I tried to do that with the Kubota, the rear wheels (with water in them) would clear the ground if you hit a little bump. In fact, we quit trying to move two bales at the time with the Kubota, because it was downright frightening. The heavier NH, as well as another NH 6610, which is nearer the same hp rating as the Kubota, handled two of the bales with no adventures.
If I owned your farm I would be looking for a bargain on a used Ford/NH 3930 or larger. I have a 3930 now, and it is a heck of a lot of tractor for the $10K I paid for it with 800 hours. I could add a loader and still have less than $15K in it. Of course, it doesn't have a shuttle transmission or any of the other bells and whistles, and it is at the very low end of your hp requirements. It has draft control, so you can plow with it. It will handle a heavy duty 6ft. 3 pt hitch bushhog, or pull an 8-10 ft pull type mower. It will handle 3 bottom plows and pull an 8 ft. disc. It will maintain its resale value as well as any tractor on the market, especially in your area.
There are certainly other brands and models that you could say the same about, I'm just familar with NH. Of course, you can spend $30K for a new tractor.