I live in MS (one of the cheapest states, if not the cheapest, in the US) and I haven't seen anywhere with rent as cheap as 100-200 dollars. Maybe you can find somewhere that price though, who knows
Someone said off-campus in cheaper...in the US on campus is cheaper. If you're set on living off-campus, you might have to do something like go without internet or cable (you can use internet at the library, if you live in student-based apartments they will have a study room with internet) and ride a bike to campus if it's close enough. And as you go on you can figure out what you can afford. Oh, and the more roommates you have, the cheaper it is. So if you live with like 3 other people it will be cheaper. If you can find someone to share a room with you that will help cost too. I used craigslist and facebook marketplace when looking for roommates, but I decided to live on campus instead.
That's great that you're moving out, I guess that means you can study what you want now? 
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After a time, you may find that having is not so pleasing a thing, after all, as wanting. It is not logical, but it is often true.
--Spock