I am into recruitment and for first timer,it is just enough. Considering that the hospital is not Hamad, Al Ahli, Heart or American, this is how far you can get.

I do suggest that you take the offer, which is better than working in the Philippines which you will get a salary far less than the offer.
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Take it as your steeping stone for higher salary in the future or of going to the west. The exposure and or experience is far more than the salary...

Although Saudi offers more, I do believe that you will be better off here in Qatar .....