SMT,what ever you do go in with an open mind! If you have never lived anywhere other then the UK then it will take time for adjustments especially for your wife and kids! Qatar certainly isn't the worse place to live and you're not going to be there for ever. If your set of demands are not met then just move on however if they want you badly enough,I'm sure they will bend over backwards to accomodate you.
Good luck in your decision however I would test the water well before taking the plunge.
