Prostitution, food, housing, alcohol, cigarettes, construction, car maintenance, used car sales (buy them at auction and bring them in), illegal drugs (there is

Prostitution, food, housing, alcohol, cigarettes, construction, car maintenance, used car sales (buy them at auction and bring them in), illegal drugs (there is probably a certain predictable dollar flow per capita anywhere in the US, varying by "class."). Just look at everything you see around you every day and don't really see; there are probably huge pockets of under-served markets for "everything." The operator of a coffee kiosk on the right crossroads would probably be exhausted.