I know that for my oklahoma college friends they often had rent around 250/month for a room in the oklahoma city metro area (norman specifically). 200/month in some small oklahoma town is probably doable for a room.

It's been a decade, but a friend in a college town just north of Dallas had an off campus apt for $300 a month. I had an off campus apt much closer to everything for under $500, similarly a friend even closer had an apt for $500.

The prices are a lot cheaper in a lot of US metros than the tech centers.

I lived in Puryear, Tennessee for about a year. One-bedroom apartment/1000 square feet was $325 a month.

Eastern Europe? Asia?

Even in large parts of the US, you could get away with $200/mo with roommates.