There is a stop by Luka restaurant (on D400) for the Kas bus, not sure where the next stop along from there is. You would probably need to go to the bus station for the Fethiye bus. Car hire is very reasonable in Kalkan, we've always used Abi Travel and it works out at about £25/30 per day depending on how many days you have it. I see Adda are offering a jeep in early season for £150 for a week - which seems like a good deal if you want a car for longer. We've used the bus service for Kas and hired a car for visiting Fethiye and other areas a bit further afield - just for the sheer convenience. Abi have always delivered the car to our accomodation, I'm sure the other companies offer the same service.