Philip,
I'm sad to read your post of your Dad's condition.
I remember well how hard it is when a parent goes thru these things. Cancer is the ugly beast of our world.
You had many good times and a host of memories to carry you forward. My Mom had metastasized cancer of the base of her spine. I know it is painful. She didn't know what it was and lingered for MONTHS at home, whimpering thru the day till I insisted she call the ambulance to go to the hospital. After she found out, she couldn't wait to go "home to Jesus" and did so in 15 days of diagnosis.
some radiation lessened the pain allowing her to go to a nursing home attached to where she and Dad lived for "palliative care".
I applaud and admire your wishes for your beloved father to be pain free. My Dad's brother passed from outright bone cancer, and told me once quietly, that "even death is God's perfect healing".
Wisdom that still brings tears to my eyes to type and remember...
Prayers for peace for you all and strength to be there and share your utmost feelings with your father and family. May this bring you closer.
Keep the Son in your eyes!