Trump's proposed tariffs, is going to take a bite out of imported HiFi products. Domestic HiFi products like Schiit Audio, Rogue audio and DeVore Fidelity will benefit. Most of those made-in-the-USA companies are direct to consumer model. Used HiFi products might do well in your brick and mortar show room. But that seems to be having a supply issue as people seem to be holding on to their gear longer.
take a look at SkyLabs Audio discuss changes in the used HiFi market.
https://youtu.be/PUASbOb79gc?si=RFLsumWoK8rM47vj
I bought a 20-something year old guy a BlueSound PowerNode streamer/amplifier and two used bookshelf speakers for his college graduation present. There is no way he can have a big HiFi in his downtown-apartment.
Have you thought about headphones only???
You are in Nashville, how about specializing in pro-audio equipment? Something like Sweetwater but more specialized.
good luck.