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.