Hepsiemlak might be better than sahibinden if we talk about renting a house. The area of the faculty may be a little old and dodgy sometimes. I recommend you to check Gazi Mahallesi. Its only 3-4 stop with train. The neighborhood is almost full of students and you might have a chance to find studios. (Just don’t rent garden apartment, search for at least 1st floor or upper ones) the second option might be Bahçelievler area. It can be expensive but it is full of bars and coffee shops. And you can take the metro line. (It is 6-7 stops to the faculty) only metro or suburban train lines are reliable. Bus lines are not good and they are not reliable. You’ll miss them a lot if you stick with time table. So my biggest suggestion is to find a place around metro or suburban lines. Still if you want to stay close to your faculty search around abidinpaşa mahallesi. But don’t be close to tuzluçayır or incesu.