Jim Humble looks great and he looks like will be hitting 80's soon.
If he is that kind of 80's I would get him on Miracle-Mineral-Supplement hourly and be at his bedside.
I would start with one drop hourly 24/7 with some breaks and increase by one drop daily.
Sounds like to me that if you could get the tumor to go down a little, it would lay off that vein and your dad would be at least out of a state of emergency. And that is all you really need to get a leg up.