The training cost for 350/787....40-50K USD is too much, as I understand.
I will say, you can expect a total cost of "18-30K USD".
The total cost includes your type rating training, and also, you dont get any salary since the date the training begin until your first flight on the new aircraft. Things happen slowly in Vietnam. Yes, maybe the training itself is not so expensive and takes only 2 weeks including ground school. But then, you have to wait for the written test, wait for the CAAV license, and wait for something you can not imagine....
You will be very lucky if you get all things done in 6 weeks, during which you have no salary at all. So....expect a total cost of 18-30K USD for the training.
BTW, it is confirmed:"Someone is making money out of this" XD