If a surgeon is dedicated enough, there are finally enough good surgical videos and trained proctors available to considerably shorten the learning curve. How many cases? I'm not sure, but I still would not want to be one of the initial 25 patients or so. The robot is just a fancy powertool. If you know how to use it, you can do great things. Otherwise you could risk a lot of damage to the patient and to yourself. A useful website by Intuitive Surgical lists surgeons who have done at least 20 cases. Now that I have been doing this for a while, I can tell you that is a ridiculously low number and the literature supports a much higher number.
I suggest that you should look for surgeons who have done at least a thousand cases!