At the Lowe's and Walmart store west of Nashville I-40 Exit 210 Charlotte Pile GPS N36ยฐ 07.896' W86ยฐ 54.386' is a large parking lot. This is a major Metro buses stop with buses to downtown, but I do not know the schedule. You can check with Metro bus web site.
RVs and 18 wheelers park in the lot often.
Please give me enough troubles, uncertainty, problems, obstacles and STRESS so that I do not become arrogant, proud, and smug in my own abilities, and enough blessings and good times that I realize that someone else is in charge of my life.
It's not going to happen. Parking in downtown Nashville is at a premium, and much of it is in multi-level parking garages. Your best bet is a shuttle, as others said.
Single empty-nester in Middle TN, sometimes with a friend or grandchild on board
Big church lot west and just south of the arena a few years back. Maybe Google maps will get it for you and call them. Got harder every year so we gave up and stay out at 3 Rivers.