This land sounds ideal for mob grazing to me.
You get plenty of rain, very little snow, and not too many days below freezing.
Nothing will increase the carrying capacity of the land, the health of the land, and lower your costs for medications like mob grazing will.
When I hear about people spending all this money on fertilizer and spraying etc it makes me grab my wallet and hold on for dear life. Your animals will pee, poop, and stomp their way to a better fertilized pasture than you could ever hope to get by spraying stuff on it.
Imagine how much money your cattle could make for you if you never spent another nickel on weed killer, fertilizer, seed, etc. If you let the animals do the work they will do it. They will love doing it and be healthier and happier for their troubles.
This won't work for a lot of you guys. I wouldn't want to try mob grazing waaaay up north, but near Murfreesboro they get plenty of rain, less than 6" of snow every year, and it seems like they don't get that god awful summer heat that a lot of people deal with.
For a lot of people they get caught up in the big numbers game. They're making such a small profit per animal that they think they need 500 head to get anywhere in life. If you can reduce your feed costs to near zero and you can reduce your pasture costs (fertilizer, weed killer, and seed) to zero, and you can reduce your worming cost to zero, then you will see that you don't need nearly as many animals to make the same kind of money.
However, I would advise against buying more land when the land that you have isn't being utilized to its full potential. If you need to clear the land then do it. If you need to fence the land you should do it. If you already own land free and clear that is going to be your biggest nut to crack. I would take your money and put it where your land is.
Sometimes clearing land doesn't have to be as expensive as you think. Talk to your local timber outfits. Have them cruise the property you want cleared and work something out with them. Maybe you can get them to clear the whole piece and take the timber that is there and you break even or put a few bucks in your pocket. Now you have clear land and it didn't cost you a penny to do it. Sure, its bare clear land, but it won't be forever.
Fencing your land doesn't have to be a million dollar project either. You can run high tensile around your perimeter and do it reasonably. Then just use portable stuff for dividing your paddocks.
If you have a lot of brushy undergrowth that needs to be cleared out then maybe you would be better off running goats and pigs for a year and letting them eat it up, fertilize your ground, and put a little green in your wallet at the same time.
There are a lot of people who are going to be envious of your position. I just hate to see someone go out and buy land, far from home, where they can't keep an eye on their stock, when they could do something with the land that they live on.
I probably won't change your mind, but if you want my opinion I would be happy to go into more details via message. You can tell me the specifics about what needs clearing, etc and I can tell you what I would do. Its not the be all say all of everything, but if you have it all figured out on your own you wouldn't have asked here in the first place.
I wish you the best of luck in whatever you decide to you and hope that you enjoy your cattle and make a good buck out of them at the same time.