Is the estate in your friends name?

I could be wrong but if no, putting him in a assistant living/memory care, I believe the state will sell off the estate to cover any unpaid bills when the dad passes away and friend may not get anything after the sell. Not sure if this is correct but its something to look into for your state.

Also, consider hospice care, if he is a veteran, there are tons of programs to help him out.

Living in a decent memory care here where I live is $10grand a month. There is a lot he needs to discuss with a medical provider, hospice care provider and assistant living homes.

I volunteer for a local hospice. When patients are in home care like you're friends father, I would visit once or twice a week and provide caregiver relief for a few hours and I would sit the the patient. We would talk, play memory games to exercise the brain, sometimes id help with chores if needed.

I was recently told a veteran just came on board for hospice care that is in home care, but i can't visit him until he requests volunteer services. I am a recent retired veteran doing this hospice volunteer for 2 years now.

Its a lot to take in for your friend. It is no easy feat caring for someone with alzheimers/dementia especially alone. He does need to speak multiple people. Start with his doctor, on the side talk to assistant living communities and hospice care. He will have to pay for both assistance living and hospice. By doing in home care, does save a lot of money.