I do not think anyone should move here with debt. I also have been doing a lot of research and 50K/month is not going to happen as a new teacher. He would be better off working in the US and save a few grand if he wants to make the move. I am getting ready to move over and that is what I did. Paid off all my debt and saved enough for a 4 week TEFL course and enough to live on for several months. If he is interested in South Korea, there is a good thread right now on a guy working there and saving $1000/month.
I agree that Thailand would be a much better place to live then South Korea.