We (me & my girlfriend) are renting the spare room in our flat. At room you'll also find a closet and a desk. The flat is 10 mins by walk to the Osmanbey metro station and 15 mins to Taksim Square. There is also a bus station in front of the building. Kurtulus is a nice peaceful district. The flat has a living room which you're more than welcome to chill out any time you want. Same for the bathroom and kitchen usage.
Let us know if you're interested