QR 515 is a trustworthy guy and 20K is realistic number provided the conditions described by schneiderthrophy are met. The only problem is it remains 20K throughout years despite rising seniority. Savings are the same as they were 5 years ago despite almost double salary, I'm afraid.
Fafa as far as I'm concerned QR judges your performance and I've flown with some Iranians in QR. I only have good memories about those guys. True professionals and great aviators. My best regards to them.
Don't take it personally take it on the rocks!!!