Hi Tom,

Take the package and fly out to Qatar without double thoughts. You will be able to Save since you are getting house allowence/rent. Accomodation is the most expensive item in Qatar. Food is also some what in high price compared to UK. but over all it will balance out with Tax free package and NO VAT to pay.

I belive UK citizen do not pay Tax if they are working overseas. But U.S citizen do. so it's a win win situation if you can handle the weather :)