Hi, what a great friend you are.
Kris had different surgery, so I can't comment on the tonsil surgery recovery. I'm hoping that his pain and meds to relieve it, are sorted prior to discharge.
I so wished that we had had some help with the outside chores, particularly the lawn mowing.
I also think that if you and others can give the Girlfriend some time out that would be beneficial. Someone to sit with your friend for a couple of hours while his girlfriend can get out for coffee, a walk, some shopping etc.
Some help with meals. House hold chores.

I guess you friend will have radiotherapy in his treatment plan at some stage.
Someone to help get him to and from all the appointments that become necessary , to share the load will help . At least an offer to support them through this - this simple thing is of enormous benefit mentally.
I really just wanted Kris to be treated normally. I wanted friends to drop in to see him. To have a drink with him . To just talk to him.
Many of us who have walked this path find that our friends drop out of our lives.
The most important thing you can offer is your friendship and your time.
I thank you for being such a friend.
Tammy