I didn't read most of this. It is doable, but you will need to focus your attention to online sales. I have a few locals, and that gains traction almost weekly, but it isn't enough to stay in business. Shoot a PM, and I will be more then happy to talk about our experiences and possible startup costs. I still love the hobby too by the way!
This. Is. Worth. Its. Weight. In. GOLD.
Aquatic Arsenal just offered you the equivalent one of Willy Wonka's golden tickets.
If you really are giving serious thought to making this leap ... and you haven't already reached out him, take him up on his offer and PM him!
And do it before you do anything else.
The insights you gain can give you a clear, detailed, first-hand picture of:
- what the journey and work will be like versus what you envision it to be
- help you spark thoughts and ideas on which type of business pathway would be your most enjoyable way to start (a local storefront ... a small home system with online sales ... a small home system with niche items sold locally by appointment only ... coral only online ... fish-only online ... etc., etc.)
- shave time off of your preliminary planning AND make it more accurate, AND...
- form a link/relationship within the industry
I have never run a physical store front. But I have made a major career switch -- from engineer to freelance copywriter. And I can tell you that having mentors to learn from made all the difference in the world.