I was looking at several properties in that region last year, and I can tell you, you can buy a lot of good property there for little money.
Most counties provide few services, which means that property taxes are low.
The government is quite laid back in most areas, which mean you do not have a lot of people telling you what to do/how to live.
Don't expect to get rich selling organics locally, as the locals are not into it yet, and Craig's List is full of people selling $1 farm fresh eggs.
You may need to work that clay soil a bit, but the climate will grow just about anything.
If you are there (or going there) be certain to check out the West Tennessee Poultry Club - great bunch of people.
http://www.poultryclub.proboards.com/index.cgi