I think you've got a good offer,it's not easy to get a private company or employer provide you with accomodation so if you are offered one you can live as a princess.
Salaries in this country are mostly fair enough compared to other countries,the only problem here is getting started,like getting the accomodation and buying a car and you know all this headache,but since you have all these being taken care of then i think you'll be just fine.
Welcome to Qatar Living,stick to this page it's got a lot of good people and you will have many friends waiting for you when you get here.
Good luck and best wishes...hey,will we get good offers at your hotel when you get the job???!!! ;) lol