I've been working here full time for 18 years now, and no, not as an English teacher, and all I can say is to make a good living here, best is to work in an area that makes money in tourism, revenue from Western Foreigners.. That's where the money is ( unless you want to work in an office for 20.000 - 30.000 a month, no thanks ! ). How many languages do you speak ? Experience in teaching diving, manage a dive center, speedboat or tour company? Travel agent or tour rep experience, or can manage a hotel ? And, no, Bangkok is surely not the place to be here, much more tourism and action going on in the South.