I'm in Hendersonville which is North East of Nashville. I've lived here most of my life and I've traveled all over North and Central America don't really care to move anywhere else.
East of Nashville, the further you go, the cheaper houses and land get. Mt. Juliet is growing quite a bit right now. Murfreesboro (south east) is a college town, but is nice. Lebanon is about as far east as you want to go if you are working in or close to Nashville. There are two big lakes east of town. The cost of living is pretty low. No Income tax, but our sales tax is a bit high. Property taxes are relatively low. Franklin (south of Nashville) is pretty expensive, but it's definitely not the norm. If you are an outdoorsman, this is a very good area. The beach in Florida is only 8 hours away. The Smokey Mountians are a few hours away in East TN.