I live in NE Ohio and the average here for an LPN in a SNF in 16-19/hr. I think 12.50/hr is pretty low. I was looking on the state of Ohio website and I saw there was a correctional facility in SE Ohio hiring LPN's. Have you tried looking in other places?
I live in Dayton and I make 17.74 an hour. That's for part-time too! I think that's good. I have been at my job for 2.5 years and started at 16. I think that is really low! Course when I worked as a medical assistant I was paid less than $12.50