Thanks again for your replies.
Tally Ho, you are right that I should break the package down further to work it out better. It turns out a flight home isn't included (so I'll allow 8500 for that - current price with Etihad). Also, Welsh Lady is right, I am married and likely to be sponsoring my husband (he is a farmer, and hence unskilled as far as education etc) and two children.
The agency gave me a generic list of what to expect in the UAE and on much closer investigation, the package was worse, but salary a lot more generous... so depending on what the eventual salary I am offered depends on which works out more attractive. It has certainly helped me get my head around how it's all done in the UAE. As for accomodation, it looks like they'll pay direct to the landlord as there is an option to take 3000 cash instead.
As I've mentioned before we are not in a desperate hurry to move (my father is dying here at the moment, so obviously I want to be here for him). If the overall package was generous enough we would really like the opportunity to travel now whilst the children are still small. We are at an inbetween point with our own business... and I'm a little tired in my current position and ready for a change. We don't want to go to Abu Dhabi just for the sake of going there, we want to be able to save some money, hence the questions. To work out what is reasonable and what is not.
Thank you so much for your help, it's been great. Thanks also Welsh Lady.