The pay rise would already have been taken into account with the salary they offered. I take it you will be looking for an apartment for that price. You won't find a villa, even unfurnished. As Novita77 says, the housing in Mesaieed won't be ready anytime soon.
Have you read any of the posts regarding the possibility of housewives not being allowed driving licences? Makes for amusing reading.
When will you be coming out? I'm in UK at present but returning in June. We love the summer in Qatar. So much quieter.