Need advise. In dilemma.!!!

Please help me out...

I'm working in a reputed firm drawing a salary of 9000 Qar/ month. I was recently granted family allowance of 3500 Qar/ month, 3 months ago. I have the rental agreement, which is direct with the Qatari landlord and it's a brand new apartment in the city (not villa). I have got the rental agreement endorsed by the municipality and having other necessary documents like electricity, water and Qtel bills etc. I haven't applied for my family's visa (wife only, no kids)yet, as I've heard that the rejection would be more difficult for the reapplication. So, I want to put the application with relevant requirements. My problems are, the salary is only 9000 Qar in my legal contract and i'm having only 3 months bank statement. My employer is ready to provide NOC and salary certificate indicating the accommodation allowance also. In this case, would it be a brilliant movement if I apply for the family visa with the available documents as my wife is here on visit visa under my sponsorship for the past 5 months? Kindly advise me. I would be grateful for your valuable advises. Thanks in advance.