No doubt the Gulf will provide 3 big carriers for you to consider - all growing and all providing long haul opportunities. Based on what I have learnt, I think the one you are looking at is a strong candidate.
Can't comment on living expenses but I am sure others on this board can. Just bring a lot of extra suntan lotion!
Some intel regarding the airline in question: evidently hiring for the big Boeing aircraft recently and a particular applicant who was ultimately hired was told that the 787 is wide open for FOs (training to start this summer I believe) because few internal pilots have bid it so far... At least this is what he was told. 70-80 787-900/1000s are on order. Not certain about the Airbus side of the fence.
Good luck.