Twink,
I was with my Dad when he left this world, my Mom too. I consider that to be a great gift, to help them pass peacefully (and to be be able to). I hope one of your relatives will be there to support you.
My sister was with me.
Just remember that many people here are praying for you and your dear father.
My Dad also died from cancer, at age 92. It didn't take long from diagnosis. It was hard to see him suffer and it took a lot out of me. He also wanted to remain in his own house, and he did until about the last week when he was hospitalized and had hospice.
I'll keep you and your family in my prayers....