Isn't it great, how far medicine has come?? A few years back they had no idea that they even needed to look at lymph nodes, then they figured that part out and just randomly removed them. Now they've figured out how to test to see which ones are the primary 'drain' sites from anywhere in our bodies so they only remove the primary ones. That's awesome.
Gwamma, you're right to take this a step at a time. No sense borrowing trouble!! I very much second Badgergirl's suggestion that you look for immersion activities.
Also - when I was a kid my mother used to make me 'egg nogs'. It's not at all what our American friends know, but it was whole milk with eggs whipped into it, vanilla and a bit of sugar. It was my 'sick' food and it always made me feel better! Maybe plan your soft calorie-dense foods around your DH's childhood foods?? Another one was bread and butter pudding, made by my grandfather.