Be VERY careful with housing. You will NOT find something nice for 650BD. A few years ago you would have but the rents have gone up considerably. When I left we were paying 620BD/month and the new tenants are paying 800BD - and I owuld say our house was OK. It certainly was not fancy. If you are serious about GF bring your wife for the interview and try and spend a few extra days. Call an agent and spend a few days looking at housing - what is available, where and how much. THEN make the decision with your wife.
Idemnity - you get half a months pay for each of the first 3 years. After that you earn one month of pay for each year of service. If you leave within 3 years you get none of it. If you leave between 3 and 5 years you get half of that. After 5 years you get the full amount (ie. 1/2 month for the first 3 years followed by one month pay for each successive year).
Expect schooling to go up 10-15% a year.