NEWBIE: What should I consider?

All,

Hello.  I am looking for advice from people on the ground or have recently worked out in Qatar. 

I am an IT contractor that normally contracts in the UK and EU through my own limited company.  I was asked if I was interested in a role in Doha by. a UK head hunting company and they put my CV forward to a local agency.  Now I have been asked for a skype interview for a role in Oil and Gas.  The role I am told is a six month project that is both offshore on the rigs and onshore in Doha.

Can someone give me a bit of a heads up and help me be a little less green:

What sort of stuff do I need to negotiate into a contract? 
What do I need to consider that I might not have thought of sitting in a rainy UK house?
What sort of stuff should I ask in the interview?

Thanks. for any responses in advance. 
Fox.

What sort of stuff do I need to negotiate into a contract?

    - Base remuneration
    - Periodic performance increment
    - Full health coverage
    - Round trip flight R&R
    - Housing allowance
    - Transportation allowance
    - Education allowance
    - End of service benefit

What do I need to consider that I might not have thought of sitting in a rainy UK house?

        - Tell them that you are attending technical IT seminars to enhance your technical expertise

What sort of stuff should I ask in the interview?

        - Long term plan of employer potential future projects initiative in Qatar

Thank you for your response.

Good luck, and hope everything goes well  :)

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