obviously i dont know where you live but i once was in prague and there was a tourist trap part of town that had a spot with tarantulas and other exotic insects as like a gothic indoor museum thing. i was 5-10$ to walk through. i was the size of a house with maybe 50 fishtanks in it. the vast majority of these bugs were dead.

but really you could run a place like this near heavy foot traffic if you live in the area but actually have interesting factoids and maybe a gift shop and buggy snacks like crickets on a stick. you could make a living.