If you expertise is around "9 months" it could be difficult to get a job (I didn't say impossible)

Have you tried in the O&G companies webpages?? Try and see what are the positions available.

As pr the cost of living check the link since topic has been discussed several times here in QL

http://www.qatarliving.com/answers/cost-of-living/how-much-should-i-expe...

This could enlighten your ideas and doubts.

Regards!!