I flip properties and rent in this area so I know both sides of the market. The rental market is very strong, but the the sales side of it is not for a few reasons:
1. Most lenders will not want to touch loans for such small amounts.
2. People who would be willing to buy in low priced areas typically do not have a high enough credit score, even though their income is sufficient.
3. A house for 35k will typically have city violations which require funds to be put in escrow until those violations are fixed. This takes cash, which most buyers in this market segment do not have.
4. Some people are still afraid to buy despite favorable prices/interest.
5. Many current renters would want to buy, but cannot because they had recent foreclosures or bankruptcies.
In general people in this area can buy the house they currently rent and save $100 to $200 per month in payments, but the reasons listed above prevent them from doing so.
I would be comfortable renting in this area, but be careful with your flips. You have to make sure the numbers are good and include a contingency for longer hold times.