I am so sorry you all find yourselves in such a situation.
Look for posts by JAM (Amy in the Ozarks) and Cookey (Liz in the UK), both of whom have been in your shoes. Each kept a running commentary in the OCF Cancer Blogs forum -- Amy's is called "A Caretaker's Journal" and Liz had two: "Walking towards the light" and "My lone journey."
I am sure you will hear at some point from both of them, as they are both here frequently. My thoughts are with you and your husband.
-- Leslie