Everyone's given pretty much the advice I would give you
I'm currently staying with a friend of mine and her husband in their apartment - I know they wouldn't accept money as a type of "payment" for staying here, but I try and do other things - I've bought dinner and prepared dinner for them last night, I've washed the dishes and cleaned the kitchen yesterday as a surprise for both of them (which was a *big* hit), and I'm just trying not to disrupt their normal routines. It helps that we also celebrated our Christmas together while I've been here, so I've been able to "spoil" the two of them with a few extra things
I think Mr. AXiD670 will be just fine staying with the friends and helping out - doing the little things that most of us take for granted (such as the buying meals, cooking dinner, doing dishes one night, etc)