Salary / Cost of living (Doha)

Dear all,

I am currently working in the Netherlands.
I have been contacted by a headhunter for a permanent job in Qatar. He asked me what salary I would expect, however I have no clue what the cost of living would be in Qatar.
Furthermore I woudl like to know what arrangements I have to make to compensate matters like healthcare, Pension, Disability insurance etc. Could anyone please provide me with more information? Or send me a usefull link?
Thanks in advance!

Kind regards,

Frank