if it is your parents, what do you do?

I think that is the only question you need to think about it. It is not long time and if you wait for another 10 years, you will regret why not give him a try.
I have a friend whose dad got the same problems, she made all of effrots to save it even she know there probably has no chance. But at least you tried, you will feel good after 10, 20 years when you think about it.