How many years did you house your son and your daughter? Seems to me that they could make room for dear old mom and dad and dog for a couple of weeks ;^) Did you put your furniture in storage, or just cram it into other rooms?
I think that refinishing floors while living in the house is an agonizing experience that is NOT on my bucket list. We did ONE room (ourselves) back in CA 45 years ago, and I said “never again”.
Dear John Dad
So Sad
Too Bad
You've been Had
The Cads