I'm from the UK and worked in Doha for a couple of years 3 years back and the rent is expensive.

However, if you can get your firm to put you up for the first month you should be able to sort a room sharing with another Westerner which means more wonga for saving/spending.

There's plenty to do in Doha and loads of Hotel bars for weekend leisure. There's also sports clubs you can join (football, rubgy, squash).

Good luck.