Fahr's being studied at NIH
I hope it's OK to post this response (which I also posted on another thread) because it's a pretty exciting opportunity at NIH.
You can live anywhere and have your Fahr's studied at NIH. E-mail Rena Godfrey at godfreyra at mail.nih.gov (replace "at" with @) -- she's a physician's assistant working in the Rare and Undiagnosed Diseases program.
They are currently studying a group of about 14 patients and looking for more. Through them, I learned that there was a recent Chinese study that identified a gene for Fahr's, but none of the patients in the NIH group have the gene, so they are saying it's polygenic (more than one gene can cause it) in nature. Symptoms vary considerably by individual, so the (rather scary) information on the Internet may or may not be applicable to you.
Please do contact them. The more people they have, the more they (and we) will learn. Treatment is free.