There are three things you need to grow hops: plenty of sun, something tall for them to climb, and a growing season longer than, say, you get in Alaska (no, seriously, SWMBO and I stopped by a brewery or two between various outdoorsy excursions on an Alaska trip a couple years ago .... their hops were sad little plants).
It's not true for commercial production, but just for a few bines for personal use, your local garden supply store and garden hose can easily make up for anything you're missing in terms of rainfall or soil quality. Heck, I do OK in 10-gallon pots in chilly, foggy San Francisco, you'll do great in Nashville.
For the hobby grower, hops are grown from root cuttings called rhizomes. They become available in the spring -- if your LHBS doesn't carry them, they should at least be able to tell you who does.
They're tenacious beasts -- wait until after the last frost (is there even frost in Nashville?), stick the rhizome under a couple inches of soil, make sure there's plenty of water, fertilizer, and sunlight, and set up 15-20 feet of twine for them to climb, and stand the heck back. You may not get much in terms of cones the first year, while the plant is putting energy into turning that sad little rhizome into a full root system, but a couple of bines should give you more than enough for flavor and aroma additions on a batch of beer once you hit year two.