Hi Ismael,
I first went to Kalkan 20 years ago, and immediately fell in love with the area. Without doubt it is my favourite place in Turkey - there are so many "must see´s", fantastic beaches (especially Patara) and wonderful diving.
If you "Google" (Kalkan Turkey),you will find many other web sites with invaluable information about the area, loads of photographs and visitors comments.
Many of the previous posts say how wonderful Kalkan is, but until you visit, you will never really know just how special Kalkan is. Sure, it´s expensive, but Kalkan is the Nice/Marbella/Capri of Turkey and lifestyle investors will also want to own the best.
If you want any more advice or to be put in touch with some people in the area, please let me know.
Happy investing
Andy