Dont know the current hiring status at SunExpress but have the following info on costs of TQ's in Turkey.
Only Turkish pilots are generally bonded unless you are already rated and have experience when you get in and you get a lower bond.
Cost of TR for the main 3 that hire foreigners (when they hire that is
)
SunExpress 30/32K
Onur Air 35K
Pegasus 38K
Pegasus is the worst because they generally throw you out after one summer and it does not include housing during training etc. which the other do to some extend.