At 66 yrs old he probably feels too young to except his situation. My husband is 80 , had Parkinson about 8 years. Only affects his walking and now his voice , tremors in one hand . I relate because my husband doesn’t realize, that I’m the one who does all the leg work. It’s a hard decision, I would go because different medical Centers have different procedures and treatments. My husband is. VET and VA. In our area was useless. Travel 2 hours and VA has an excellent Neurology department. Meet people that said going to a different hospital, and DR. Improved there lives greatly.
One man who could not feed himself due tremors , now he has no tremors. So pray about it, but remember to consider the impact on your health and life .