I'm teaching English to ESL students in a gulf Country and at the same time working on my MA in the American university (in the Gulf). It's very beneficial if you think of teaching ESL students any where in the world esp. in the Gulf because you will be highly-paid. (three or four times more than in USA.).
By the way Master in TESOL costs round thirty thousand $ here in the Gulf. It opens many doors like teaching English to ESL students in the university. you will be also welcomed as a member in TESOL community, magazine. you can hold meetings, seminars, etc..