[rungoodinc]

Short-term yes, long-term no, unless you love teaching and are willing to market yourself for private tutoring, own a language school or create your own materials to sell. There's plenty of people out there making six figures in Asia but most of them are locals or Asian Americans who own the schools or sell language products. Best way of doing this as a foreigner would be to marry a local which in Korea at least gives you the ability to run your own business.