So sorry that you have to live in the insecurity of a cancer.
You sound a bit like you would depend much on him about your possible next steps instead of yourself or different docs.
Are there any persons there for help when your h would be unable to cope with a possible recovery?
What you are describing about him and nurse is better than what I know from my h, but yes, be a nurse could be difficult for unstable people. Should he work it is easier, than it is obvious you need a second person...
I wish you all the best