The difficulty is that there are so many properties listed for summer lets in Calis/Ovacik etc - unless you have something out of the ordinary you'll have lots of competition - and as Phil says, rates are not what you'd hope in general. In Ovacik they are competing with hotels charging £4 a night as well as other property owners.
Then you have your taxes to declare (and if you don't and your renters are noisy and inconsiderate your neighbours will soon inform the tax office on your behalf). Then big electricity bills caused by renters putting it on arctic level and going out for the day, breakages, wear & tear, thefts, hassle, pool or maintenance costs - it won't leave a lot.
I have my Calisvilla site that lists Calis properties for holiday rental. There used to be nearly 100 on there on a pay a percentage on bookings (list for free) basis. I changed it to a flat fee and lost most of the properties because people didn't want to pay - and now we have a great little site where a decent number of enquiries are split between a small number of owners, not spread thinly over 100 - but it shows that in the main there are so many available for rent, and by people who maybe feel they don't have the income level from renting to pay to advertise.
My advice is to maybe look to cover costs by looking for long term let till you are ready to move. Rental values are way lower than for holiday lets but unlike short holiday rental, demand is huge locally, and supply isn't.