Hi,
Your villa is high up above Kalkan and you would not be able to walk back from town in the evening. Depending on how old/fit your party are the walk in would take you about 25 minutes, maybe longer. Taxis are easy to hire and would cost about 10TL each way (more after midnight). You may find it more cost effctive to hire a car at least for part of your stay. Hope this helps. I am sure you will love Kalkan and all that it offers.