Its funny no one ever gives feeback on these posts as i have found out through asking similar questions. My view would be a good doctor should do the majority of the work and placing the grafts. Its important that the extraction is carfeully done as the grafts can be damaged if not taken out properly, would you be confident in a technician doing that? I have come accross some of the doctors you mention, my view would be to arrange a flight to instanbul visit these clinics first to get first hand experince, have your questions ready and see which one fits best. You can always come back for the treatment once you are ready, flights are reatively cheap as is the accomodation.
You can share your experience here and hopefully it works out for you. Perhaps you have had your treatment now?