I like fishorama's idea. I'd have it so if you can prove you've got the right setup I'd allow special ordering of larger species, but the readily available stuff would definitely be a lot of nanos and I'd also try to cater more towards the local tap water parameters as well.
My area had a new lfs open up and before opening they took a consensus with the aquarium club members and others from local groups of what everyone would want to see in store in our area. And he has delivered that and has been really good over working with his customers--even special ordering harder to find fish. I feel like that's a good approach and it's been awesome watching his store take off as well as it has, considering all our previous lfs closed down during pandemic. We were left with just chain stores for awhile until this new one opened. I feel he has opened in a smart way and has had good quality fish.
My area had a new lfs open up and before opening they took a consensus with the aquarium club members and others from local groups of what everyone would want to see in store in our area. And he has delivered that and has been really good over working with his customers--even special ordering harder to find fish. I feel like that's a good approach and it's been awesome watching his store take off as well as it has, considering all our previous lfs closed down during pandemic. We were left with just chain stores for awhile until this new one opened. I feel he has opened in a smart way and has had good quality fish.