Starting my showroom again

@ghasley you didn't say it, I did.

97% of the world doesn't have 2.34 million or whatever the number is for a "secure"
 retirement as we are being fed that by wealth management "gurus" and "experts"  and they seem to be a lot happier and less tense than Americans. By your logic, nobody should have a small business. Maybe it's not the small business idea that's wrong but the fact that private health care and everything else cost so much here. 

My #1 priority is to take care of my sick mother, support my kids and not to put money away for retirement - it's a binary choice - I can't do both. That's the old model that worked for 2000+ years. I know it's not the model of the last 50 in the US but call me stupid, I know I am not "normal". 

Sorry for the tangent @nashvillehifi my offer still stands to run the stats on the hifi buying potential of the area. 

@nashvillehifi I was certainly acquainted with your business.  You definitely have many years of experience.  The key is clientele. So many folks opening up an audio store for the first time have no client base, and they believe they will just show up (Field of Dreams scenario).  This is not your first rodeo by any stretch!  The question I would ask is, can you recapture your clientele and have a sustaining client base?  My best wishes for you, whatever decision you make.  

I’m in Nashville a lot and would love to see another high-end store in that area. With that said, it’s obviously a big risk and you better have substantial financial reserves to get through the startup cost and the first year or two. I don’t think a store would make it selling low or mid  stuff. Too much competition from the Internet, Best Buy, etc. As others have said, there is considerable competition at the high end in Nashville. 
I wonder if there might be an opportunity to get some traction as a consultant for people looking to put together high-end systems. Nashville is exploding and full of very affluent people. I doubt if this could start as a full-time job but maybe a side hustle and maybe you could get access to sell a little equipment along the way without having the enormous expense of a brick and mortar store with a full set of inventory. Even if it didn’t take off as you would want, you would have very little investment. You are obviously knowledgeable, and maybe there are people willing to pay for that

Nashville is exploding and full of very affluent people

very true and not in a good way, for the most part. Where has its charm gone?

I have to agree with the previous folks who posted. It's a gamble and only you can decide if it's doable and worth the risk.

FWIW, I was a dealer for a few years, between 2011 and 2017. Before that I restored vintage turntables and tube gear, until broken trash gear became worth $$$. I crunched the numbers and realized that I couldn't make the numbers work if I had to pay retail rent so I did only in-home demos. I was located in the greater L.A. area and looked for great gear to sell that wasn't carried of over represented in the area. I did reasonably well but I gave up every weekend and some evenings and at the end of the day I did better than break even but what I made didn't really compensate me for my time. I enjoyed what I was doing and loved (most) of my clients, but it's a hard way to make a living these days. I can't speak for the Nashville area but in L.A. most of the successful dealers have either (1) been in business a long time and sell gear that everyone wants (which means you shouldn't try to compete), or (2) have outside sources of income like a trust fund or rich wives. That wasn't me nor you either, I'm guessing.