Glad you’re back on your feet.
Your knowledge and ability to sell will be the keys to your success. There is an art and craft to retail. That extends to your selection of products. It will take time to develop your clients but it can be done.
If it were me, I’d also have a full line of headphones and associated gear. Give them an easy entry and a taste of higher end. I’d bridge the headphone and two-channel stuff with some great digital front ends at easy-entry price points. That would complement the two-channel gear. And have a small, constantly refreshed set of audiophile-level records.
It sounds like you’ve been through some serious challenges. Compared to that, you can do anything.