Better than being a starving English teacher who can't afford a gym membership or food.
I wonder if you really do think that EL trainers can't afford food. Yes, there are some who choose to work in nice pretty places for not much money, but also those who are, to use a crude expression, 'coining it in'. And most people somewhere between. It's a very broad profession.
You also have a slanted view of engineers if you think they are all corporate clones with ulcers.
I work with petrochemical engineers. They always seem to look older than they are. Sure some earn more than I do, but not much more and not always.
But now I am setting to have 15,000zl in the bank in just my first year;
That's achievable if you're good at saving/chasing opportunities. Some can do it and some can't. I know people in both categories. When I was working in Poland however I mostly had a decent income but never really could save much. As Cary Grant said "They say money talks; all it ever said to me was Goodbye".
What if the learner doesn't read literature in their own language? And what is literature anyway? Bukowski? Agatha Christie?
Exactly - one reason that textbooks for low levels start off with those topics that are easiest to speak about in your own language. If someone only ever reads Autotrader it isn't doing them any favours pushing them to read Jane Austin. An authentic text can be a pizza shop leaflet, a parish bulletin, a holiday brochure or a 'Now wash your hands' sign - all part of that balance between staying in a learner's comfort zone and going outside it. I use a lot of oilfield health and safety documents since that's a big part of my job. Understanding the English they see written perhaps on labels or signs or TV credits hear spoken every day but blank out or let wash over them is so important. Part of it all slotting into place. Neurolinguistically, that is.
It's hard to read the immense volume you will require to achieve advanced knowledge
Advanced knowledge? We're training not educating and in any case we should remember that for in-company training our learners have different levels of intelligence and ways of thinking/approaching the world.
Sorry - I don't get why newspapers don't "count" - they are wonderful sources of language with purpose. Ask Tim Grundy.
One of the best sources of authentic text and almost always something in there to catch the learner's interest - this is of course vital.
visa and permit. By the way, the cost of a return flight would of been around 1,200zl.
That suggests America/Canada. If the first of those, think about South Korea as a step on your journey. They tend to slightly favour Americans over Brits, there are some lovely opportunities there, decent jobs aren't hard to find, and in a year you could comfortably save enough to give yourself a nice financial buffer to make things easier in a nicer place. Cambodia by the way may well be 'the next big thing' in TEFL (when oil prices start to go back up). They've struck black gold, thrown off a communist regime and the market is like Poland 20 years ago. Lovely place and people too.