Hospice was a tremendous help. My father-in-law went downhill really quickly. One day he was good and within two weeks he was very close to the end. Once we got hooked up with hospice, they immediately arranged for a hospital bed at home, other equipment for their home like a portable potty, powerful pain medication, etc. They did all they could to help our family cope.
In many areas, they offer respite care so if your family needs to be out and dad needs care, someone will come to visit with him and help him out. They also opened their services to extended families if they need bereavement and grief support.
I wholeheartedly recommend giving the hospice in your area a call and see what type of services they can offer you. They were a huge comfort to our family during this really difficult time.
If you have any additional questions, please let me know. I'm also here if you want to just vent and need support. Being completely honest, it was really hard. However, knowing the end was coming really made our family say the things we wanted to say and express huge amounts of love. I miss my father-in-law dearly, but I feel a lot of peace about it.