Hi Roberto
i've just relocated in Qatar , to get a villa we are speaking about 15K to 20K , not less than that , so your budget here can get you a good appartment with 3 bedrooms.
As for the car it depends of course on teh car model but you are speaking about 2000 Qr/m
i've dealt with a company called Retaj and they were very professional and found me a very nice appartment , my real estate experience was wonderfull.
this is their office number 4995555 and i dealt with a guy was called Hadi i think he is lebanees i think.
best wishes in your trip :)