There's a REIN group in Nashville proper which seems pretty active. I just recently bought my first deal (Live in flip) in north Nashville off Trinity Ln- and in the last 6 months the property values of those houses around me have gone up by about 10k, based on what they're selling for.
What are your specific goals? Are you looking for a buy/hold rental SFH, a Multi-Family, or are you looking to flip? I'm currently looking for a flip now, and would absolutely love to have someone else on the deal to make it go that much more smoothly/painlessly.
For SFR's, there's some good forclosures in north Nashville, but the market really seems to change mile by mile here, and where I'm at, half mile by half mile. For example, there's serous appreciation happening where I'm at (C+), and it's significantly hotter just a quarter mile down the road west of here (B, but half a mile in the opposite direction is a C neighborhood that is not experiencing any growth.