Well if you'd really like to stick around this part of the world but get out of the teaching game, there are ways to do it. It was really hard for me to break out, but I found a way to thrive without teaching after a lot of trial and error.
What's your educational background and/or the kinds of non-teaching things you'd like to do for work?
I've been investigating doing something online. I've been talking to other digital nomads and been working on web design even though that seems like it is probably a nepotism based industry. My educational background is in economics.
I taught myself web design several years ago but I haven't kept my skills up to date, that stuff changes so fast. I think in the early days it was easier to break in, but now with so many easy to use website builders, many people are able to make a good-enough site on their own, so basically you're left with nepotism like you mentioned, and that's why I never pursued it.
With an economics background, you could easily offer services (at least here in Cambodia) to Microfinance companies here, possibly even major banks. Perhaps specialty English classes for the finance sector could give you a backdoor into other types of work within the industry. Once you're foot gets in the door I could imagine it would be easier to find more ideal jobs and get away from teaching.