You will get only a visit visa for your wife which will be valid for 6 mnths, each month costing QR200.Since company is providing you accomodation, you can ignore the expenses for the same which will at a minimum cost 3000QR for a decent family accomodation.The criterion for permanant family visa eligibility is to have a salary of QR 10,000. Summing it up the decision rests with you depending on your circumstances and how badly you need the job.