Hi,
We had both My wife's father and mother suffer from Alzheimer's Disease, her father first, mother second. Her dad was a WW2 vet and retired Navy so expenses were not over $12,000 per year at there peak. Her mom was really more expensive during the gray period of the disease when we were trying to help her keep a "normal" lifestyle. The assisted living was about $40-50,000 per year for that period. After she could no longer function her expenses dropped to about 30-35,000. I'd like to mention that due to careful planning on their part we never spent any of our money.
Hope This Helps, God Bless, Mace