this is from my observation and having opened a small retail (other stuff) for a short period. when you want to open up a retail...
1) you dont think of yourself or what you like or "think" other people will like from your small room in your house.
2) you need to establish and have a figure on who and how many your target customers will be. how? go out, look around ask people, as many as you can get.
3) you are going to sacrifice you time for that. you dont expect you open it up and have your workers run it for you. the more time you spend for it the more success rate it should be.
4) you are going "professional" way, it means you have to do anything to survive even if its what you dont like.
5) not just "professional" way, but your are going "entrepreneurshit" meaning you will be pouring money out of your pocket and your bank's debt. so think twice, thrice of even 10th times, mistake is not an option, esp if its "one way trip".
6) above all. you must be "selfless", i mean in other word... you dont expect to get what you want. relying on few local hoobiests is simply delusional imho.
btw my retail seems to go down very steep, i think because i violate rule #3. i think i spent too much time foruming. !@$%$#%^#$ but since its not a "one way full blast" trip and only small'ish investment, "pulling up" will not lose me an arm and leg. fwiw, my bros too they are in auto car accessories business but since that business is quite hot, so they are not running out of business and customers up until now.
back to local ee shop. i need to pray to santa claus if i want to find the simple LM324 opamp in our local shop, let alone the arduino. they got all the fancy mosfets and stuffs that i figured out later to be usually used by other ee repair shops or in many products in local market. they got fans, lamps, and other gadgets for home ee improvement stuffs other than the mentioned "farting toys", even the coax cable is only for our local tv decoder unit 75ohm white fat type, you will need to pray to unicorn if you want the 50ohm coax big or small regardless, let alone coax used by rigol probe. so those who survived are the one who look around and find out whats the "demands" are. and where "MEAN" is the mostly used stuff in techical engineering, thats not going to work in business. business works with "MOD" the largest group. if you use a rare car you are going to have a hard time looking for parts, whats piling up around me are parts for our local "national" crap products. cant really blame the retailers et al, they need to survive btw, so i'm "the special kind" is on my own
edit: one of my bro is a car audiophool sound blast maniac, if he has to rely on it alone i think he will spend most of his shop time sitting watching the dust fly away, inevitably he has to sell car tinting service, dumb accessories and car's fart toys. otoh my other bro is doing car's sticker and just that, he still survive so go figure. i believe its his sidejob for doing signboard contract jobs (using stickers) thats helping to pay.