There are jobs out there. I want to live in South America though and there aren't a great deal of jobs out there nor a particularly well established EFL/ESL community like there is in Asia & Spain.
People seem to think it's an easy gig, but it's really not. During the CELTA course you have to teach students (whereas a lot of the others you don't) and it can be quite hard work. Hell, some lessons I was teaching them something that none of my friends or even myself could explain. However, you'll get better with time. Plus, the money is generally terrible in schools. Enough to live on sure, but you won't save anything. Fifiov will be able to comment more on that though.
Finally, do you have a degree? You'll struggle to get a visa in a lot of places without one unless you have extensive experience in another field. You say that you're in your 30s. Perhaps have a look at business English if you've been in business for some time? I'm looking at ways to teach legal English but there's not a great demand in it.
I put myself through the course with the intention of getting a job pretty quickly but that's been delayed a wee bit. However, I think it's worth while doing it and seeing if you like it. It's a great way to see the World and do something worthwhile.
I do have a degree and i actually have about 5 years of teaching experience - after school teaching through a tutoring company. But not in business studies or languages. But still i know a thing or two about preparation and what to expect from the people your teaching.
But could i up sticks and move somewhere else if as you say you get paid peanuts. Think i would plan on doing it for a year maximum and see how went from there.

- what is "tefl"?