I did the week long Mayo trip for second opinion/diagnosing purposes. If you are looking to get it done in a short period of time, it is good. A LOT of tests, some repetative--they repeated ones I had already had. Just note, they may want to do the EMG/NCV that you are hesitant about too.
I stayed at a place called The value place, that charged by the week. A lot less expensive than the hotels right next to Mayo The room had a small fully equipped kitchen. There was a free shuttle that ran between there and the hospital numerous times per day.
The mayo accepts several insurances, all of my medical tests there were covered 100% by anthem Blue Cross ( I had already met my deductable---the IVIG took care of that in one infusion).
Not sure what info you are looking for regarding mayo, feel free to ask if you have specifics questions