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I am a businessman and I could wear out my keyboard listing the problems and difficulties involved but this should suffice
Do yourself a favor and get a real job
If your desire is insatiable, breed a few fish in your garage and sell them to local hobbyists
That should cure you
I am not a business person, so I can't answer with things like ^^^ above me for loans, financial, etc.
I can only say, keep the customer in mind when you do get opened up, or even before you open.
If I was opening a store, I'd have this mind set (if it's wrong, you know why I don't own a fish store)
A. Is there a need - By you saying that you're 30 miles away, I'd say yes. Maybe post in your "state" thread and see if people respond with "yes, I live near by, I'd love to shop at your store if you had one" (long shot, but eh, test the market right?)
B. When looking at your store front, maybe ask yourself: Does this look like a fish store? I know it seems like a stupid question, but hear me out. My favorite 2 fish stores (LFS) (aka not petco) are in VERY small strip malls. One is in a downtown type setting so I think it's just a long street with no alleys... *shakes head* Anyway, Some buildings won't even let you have that much water in it due to insurance. I know the building my work is in (um, lets just leave it as pizza delivery) is supposed to wash the building and the cement and the parking lot but it doesn't happen, and our business suffers accordingly. I hate to do someone elses job (if you catch my drift) So when looking for a real estate in which to rent/buy, think this: Can I make this look like a good CLEAN fish store. (Paint on the windows with cartoon fishies seriously brings in the kids/parents.. no joke)
C. Equipment: I've seen some on massive filtration systems and my favorite fish store (www.worldofwetpets.com) has each tank (large and small) on seperate filtration. I personally like the latter only due to if there's a sickness you've only shut down 1 .. maybe 2 species of fish, and not the whole system. I've also seen their display tanks with CO2 and lots of ferts (what you can accomplish) and also basic gravel "fish keeper" aquariums. I've realised now that some fish prefer that (TLDR: Think about what the customer is going to see when you enter and put yourself in their shoes. If they wouldn't buy from you, you wouldn't buy from you. You don't need fancy setups, but healthy ones!