The hardest questions is that is currently taking patients. You might have to do a list and work your way down, just get in line with everybody. I got in line and I was lucky to get in with Dr Rey at klimas on time, I have been in treatment for 2 years and still on call for all the others (I am still in line with most).
Another thing is I didn't know what was my issue, mold, Lyme or whatever so I Wanted to get into one of the most generic ones that would test for me everything : Like Klimas, Peterson.... (instead of a neuro CFS or stomach like Shia.).
Good point you might want to see how it goes first and maybe do some travel before doing a permanent commitment, you might have to try a few before you settle.