Losing the Battle for Dignity of Life

I find myself in one of life's lousy situations. My mother was killed as a result of a car crash 10 years ago. My oldest brother, Richard died last year from COPD, heart failure and most likely lung cancer. My father has Congestive Heart Failure and COPD and this has resulted in other medical complications. Last week, he went into the hospital in Florida and I was on a plane from Israel that night. He is now back home, but he is suffering and quite miserable. He cancelled a doctor's appointment today for his now problematic kidneys as he has decided to let whatever happens, happen. I fully understand his decision and therefore had no arguments.
His quality of life has deteriorated considerably and will continue to do so as COPD is a progressive disease with no cure and only minor things that can assist his quality of life, such as being connected almost full time to oxygen. He has lost his most cherished of all aspects of his life, his independence. At almost 90 years old, most people would say that it's amazing that he has been so lucky and had his independence and good health for as long as he did. In many ways, this is true and indisputable. On the other hand, this is my Dad, the same person I remember jumping the fence of our schoolyard to put out a fire that he accidentally started by shooting fireworks on the 4th of July. The same person who hiked with us in the Grand Canyon when he was in his mid 60's. The same person I have fought and argued  with time and again over stupid things. The person who has always been there to support us.
He is now all alone with his 2 living sons and all 5 of his grandchildren in Israel. No, there is not a question about bringing him to Israel, for all kinds of reasons, most of all, it would not be to his benefit. He wants to live in the house that has been his home for the last 20 years, the home where he lost his best friend, my mother, and is the place filled with memories of his and my mother's life together.
I had planned to make him a 90th birthday party with my brothers, relatives in the area and his friends. My oldest brother is no longer with us, but we still hoped to make this party in June. My optimism level of reaching this milestone is less than great.

The lousy situation is now -  We need to have the discussion of how he wants to continue to live and how he wishes to die and leave us. I had this type of theoretical discussion with my mother many years ago where we made a pact that if either of us is no longer of sound mind and/or our bodies have given out and we don't want to be a burden to our loved ones, we would help to do what was necessary. This type of discussion is no longer theoretical, nor is its outcome.
I have been here for my father these past few years on a regular basis, much more than most of the people in his community (despite the long distances between us) and will be here for him whatever he decides and chooses to do. None of the options are great but they are his options and my role is to support him no matter how hard as he has always supported us.
Age does not dictate when you are old enough to lose a parent. Of course, the impact of this changes according to the ages of both the children and the parent, but no time is a good time to say goodbye.
I don't know when it will be but the time is coming closer, closer than I would like.
No time is a good time to say goodbye!