Whoever is telling you you can earn 30 or 40k per month is deluded. I know someone who is reputable surgeon back home and was offered 14k here in the military hospital plus free accommodation. He rejected the offer because he is already making a similar amount back home. Only doctors at Sidra get those inflated salaries but these are very talented doctors from Canada, Australia and the US. If you can prove yourself better than them then you would get more than 30k