Good Day:
Personally speaking i dont think so that it is a bad offer. Considering you with a three years experience no doubt its a better choice. Consider other expenses which are other than your package i think still you manage to save almost 5ooo QAR.
If you are a starter i think you have to accept this, this might pave a good move to your future.Life here depends on individual, considering you alone you can manage in max 2000 QAR for grossery and outings.Where as you accomodation will be paid by company. So out of total 8000 QAR you just have to manage your clothing and food for a single person and if you are on dieting that is also not an issue then,

Best of luck