Alfa... from last year, you'll usually have two or three days off between your Long Haul trips and I knew some guys would commute up to Europe during those days...depnding on arrival times of the last trip vs start times of the next trip. There was some time restriction about being in IST "X" number of hours prior to check in.
Also... As I'm reading the information, the wide body pay left seat is 70,000 Turkish Lira which at todays rate is: $13,000 but just remember you have to factor out the bonus which is only every 3 months, so maybe 12K per month which is not bad IMO.
Kap