I presumed you have your Qatar Driving License.
Personally, if your contract is only for a year, GO FOR A RENT A CAR. I believe they will give a special offer if you are going for a package of 1 year rental. The good thing with the RENT A CAR is, they will be the one in-charge with the maintenace and GOD forbid if accident happens, you will get a new car as soon as the sunrise.

GoodLuck.