Mass on the pancreas, right kidney has tumor with no function, gallbladder doesn’t work, spleen enlarged psoriasis of the liver, how long?

I would get him on Hospice care.

You are correct. No one really knows. If he wants an answer to this his MD can give him an educated guess. That's about as good as it gets. I am so very sorry.

If it is pancreatic cancer that has metastasized, and he's been getting aggressively treated, the very most would be 2-ish years, but seems like he has so many other issues it may be less than that. My FIL and husband's Grandmother both passed from PC within 2 years. My friend's husband currently is approaching the 2-yr mark and he's gone rapidly downhill despite good treatment and will to live. A few others I've known have never made it past 2 years. A lot will depend on his age, his health prior to all those problems, and how long it took him to start getting treatment, and what type of treatment -- if he's even getting any. Also, his mental state and will to live will have a bearing on how long he hangs on for. Is his liver cirrhosis from drinking? If so, then his health leading up to all of this was already dismal. There is no way to know for sure "how long"... I'm so sorry for this awful diagnosis. I wish you peace in your heart on this journey.