Hospice is all about comfort. Palliative care means no more treatments with curative intent. It already sounds like the treatment have done as much damage as the disease by this point. Hospice is manned by volunteers. They have some criteria to qualify for it, like no treatments aside from those to treat symptoms and keep a person comfortable.
My sister was on TPN (liquid nutrition) for the last few months her life and did not want to give it up, so she never qualified for hospice and we cared for her ourselves at home, it was extremely hard on the family. But of course we wouldn't have wanted it any other way, she wished to be home and not in a nursing home.
In order to keep her as comfortable as possible, she had a permanent IV line that dripped dilaudid (pain killer), with a pump she could use to get a booster shot of it when needed. The IV also infused Zantac, as she could not keep anything down. Steroids were also part of the mix.
We have a section about metastatic blc, and end of life issues that can be considered.
blcwebcafe.org/metatcc.asp
Maybe there's some links or info that can help.
Best to you and your father,
Wendy
He can try zantac for that stomach problem.