Hello barramak, the world is full of suckers, I was one myself.....but i learned pretty quickly.
My wife's family had kind of an expectation from her, being the lucky one living and working abroad, plus the fact that she is married to Joe doubled up their expectations. I'm lucky to have a wonderfully loyal wife whom understands and shares my views when it comes to "providing" for her family. After all, I only married her, not the whole lot. We had a long chat and agreed that whatever we gave away was something we had subtracted to ourselves. We then gradually started reducing the amounts and with time it came to a point where expectations almost vanished, as the number of relatives got the message and we were left to live our lives in peace. We are getting older and need our savings, and you can bet your last dime that when the money runs out, you'll be left to fend for yourself and they'll find another sucker. Do not get me wrong, many of the dramas they present you with may be true, after all it is a developing country, but there is only so much you can afford to help and you cannot save the world.
Something for timn8ter to reflect upon....it seems you have thought long and hard about your plan of relocating, but it is too perfect on paper and unpredicted problems will always place a spanner in your works. Ever considered the cost of healthcare? You'll have to foot the bills for everything, from tests to scans to medications, surgeon fees, hospital bed fees....and this is just an example. Do not cut all links with the western world, leave something behind to fall back to if things were not to work out. Just a friendly advice.
