The floors can get ruined and I know because I went to visit a friend who lived in a mobile home and I went to use the restroom but fell through the floor right in front of the toilet. He fixed that whole a couple days later with a $15 piece of plywood.
Wow that must have been a surprise for you. My point is they usually can be fixed and your friend fixed the problem he had. It bothers me that they are sitting there just rotting.