Deep breaths, Linn.
It is not likely that the surgery will go ahead if he has an infection.
If he needs to be in a nursing facility, so be it. The first order of business is getting this infection under control. You can't have him randomly passing out at home especially if you're not there to call for help.
Maybe they can get him up and exercising a bit. That would be a good thing.
Hang in there.
Mary