You will likely get a variety of responses here. I believe hotel prices in Nashville are among the most expensive in the country, particularly around CMA Fest. I recommend looking at an Air BnB and taking ride shares down town. Be prepared for hot temperatures and massive crowds. I recommend the Don Kelly Band at Roberts Western Wear for live music. Most of the bands downtown are playing current country hits and Journey, ad nauseam. Don Kelly plays mostly pre-80s Country and serves as a telecaster chicken-picking training ground. DK Band is not to be missed if possible. Station Inn and 3rd & Lindsley are my other recommendations. Be warned, lower Broadway is absolutely nuts and typically avoided by locals at all costs. Check out BroadwayUncensored2 on Instagram for what you may encounter.
Do615.com is another good resource for live music.
Endless good restaurants in Nashville: Margo, the Yellow Porch, Etch, Prince"s Hot Chicken, Jack"s BBQ, City House, Lockeland Table, and many others.
Lastly, if Reese Wynans is playing anywhere, go see him and get your feelings hurt! Have fun!!!