You might want to take a look at the gulf coast from about 75 miles north of the Tampa, FL. and work your way northwest toward Alabama. Sure as hell isn't a place I would spend any time other than 2-3 months a winter, but your land wishes, and price are both possible, somewhere in that stretch.
BTW, having spent a fair bit of time all over North America, I can't emphasize this point strongly enough. DO NOT drop a hundred large ANYWHERE, before you research the area, then find a place to rent for a year. I guarantee that your will have a completely different take on your "dream location" by the end of that year. Maybe it will reinforce your belief that you found the perfect place, maybe you will walk away saying "thank God I dodged that bullet". I live in the northeast. I have spent winters in the area I mentioned. If you are there in January and February, it can be pretty easy to look around and think to yourself, " damn, this place is pretty cool, laid back, and real cheap to live". Then one day, as the winter fades to spring (early March) the no-see-ums show up and you have your first morning of itching like a flea infested dog. This will continue for the next nine months or so, and if you are outside, at dusk and dawn, without a stiff breeze, they will eat you alive. A few weeks after the start of that season, it starts to warm up. By May, it's so fucking hot you wonder if it would be better to just die, and get it over with.
You will probably learn, in your searching, that the days of an inexpensive home that is close to the beach, close to a major city, on large acreage, in a desirable location, was something that ended about half a century ago, in the most of North America. That leaves you with deciding how important your list is to you. You can find what you want, in places that the majority of folks wouldn't dream of living year round, or you may need to decide what "requirements" need to be eliminated from your wish list. Good luck, and keep us posted.