LOL at the disconnect many people have with the "flyover states". In my neck of the woods, $50k will buy a nice, small, well-kept 2 bd, 1 bath house with a detached 1-car garage... It's not a luxury home, but it's not falling apart either. Heck, my buddy bought a nice little house for $16k a few years ago, it was "livable" but he flipped it to turn a profit... $250k will buy you a 4,000 sf modern home on acreage...
OP, do as was suggested in the first response (I think), get a credit card (will likely have to start with prepaid or cosigned card) and use it every month, and pay it off ever month. Don't carry a large balance on it. Credit isn't built on how much you use (actual dollar value) it's built on the usage ratio, or how much is used compared to how much the credit limit is.
IE, my wife's credit score in in the 840's (850 is as high as it goes). She is joint owner on our house which is significantly paid down (but not below half original loan value yet), and her credit cards we only use for emergency purposes or small purchases occasionally just to keep some activity on them. Her credit usage on credit cards is no more than $200/mo on a combined limit of $15-20k (not sure the exact limits). Utilizing credit this way we were able to buy a 2nd home (2nd mortgage) last year with no hassle from the bank, and she wasn't even working at the time (maternity leave). I won't get into any further details on the 2nd home things as that's getting off-topic. Moderate credit limit with minimal credit utilization is the key to a high score (among the obvious answer of making your payments etc).