It depends how much you want to pay to rent property.
Decent apartments start at around 8,000QR - 10,000QR if your lucky enough to find one at that price and if you want a villa they start at around 15,000QR and upwards again if your lucky enough to find one at that price.
$8,000 equates to 29,000QR so if you're paying 15K for a villa plus car purchase etc etc it doesn't leave much left over but in answer to your question, yes, $8,000 should be enough depending upon your standard of living.
Whether you will be able to save anything is another question.