I have studied art management in Istanbul and lived there for 15 years. In last 6 years i used to share my flat in Istanbul with airbnb guests then rented a few apartments for hosting people in Istanbul.
You can check them all and if you see something which you are interested in, i am glad to give information and welcome you. When i am not in the city my friends will help you about check in and try to give you a good accommodation.
Have a nice trip