I started a maintenance company after local business asked me to take a look at their aquarium. (2004)
I took ALL the LFS maintenance business away within a year, which was a very good thing, bad business, overpriced, rude, and didn't do good maintenance on clients aquariums (dropped in snails then left and sent a bill for full maintenance, SMH) no or very little knowledge on livestock at least on saltwater.
I got all the legal docs, LLC, insurance, EIFN, sale tax number, and was able to set up with almost all distributors, manufacturers, or wholesalers unless stated that a physical storefront was needed. I actually went a little crazy 167 dry goods and 8 livestock suppliers. I now use 4 dry goods and 2 livestock suppliers.
I started building acrylic aquariums and equipment for clients. (2007)
After almost a decade of maintenance, I decided to open a storefront. Rented a place right downtown, one storefront from the main intersection.
The business plan was based on residential utilities, not good since there is a difference in billing between residential and commercial 2x to 5x more cost.
It took around 9 months to build EVERYTHING in my storefront. The tanks, racking, the plumbing, running new electrical.
The second downside was my landlord.
My livestock was delivered to me from a high-quality reputable source, very little DOA's, they would credit me immediately without question.
I got compliments on how beautiful and clean my store was, but it turned into the FREE local public aquarium. My prices were competitive with Liveaquaria but still got showroomed. I did a lot of custom orders for customers, but they didn't want to wait. They ended up driving to Petco 40 miles away. I would see them days later when their whole aquarium had ick. I carried meds but 3x the market price. They could either drive back to Petco 40 miles (2 hours), order online and wait a day or two for delivery or purchase it from me immediately. I quarantined everything for a minimum of four weeks and wouldn't put out anything that didn't look in great quality. As if I was buying it for myself.
End of 2014 I closed the store, the last month's revenue was $100. OUCH! My maintenance company had paid for and was keeping the store open. I couldn't afford to dump any more funds into it.
A couple years ago I bought a new house, the basement opens to a large driveway on the side. I rebuilt the front half of the basement for my wife's hair salon and I took the back half and started building my new storefront. It will be exclusive by appointment only. I still am the only saltwater option in 40+ miles.