The owner says it is soft at the shower. I don't know if maybe that means a leak from the inside, or a leak from the outside. No telling.
I do things right when I make repairs. And I have no idea how bad this soft spot is. But, worst case what to plan for and then anything else is a pleasant relief! So, planning on replacing the entire bath floor.
It is pretty much a one owner camper. Same owner since 1960
. An engineer and it was used until recently. That's a big plus to me. I believe it has been well maintained until last year. So, I am hopeful that floor is not also hiding serious rusty frame underneath...
Thanks for the response!
-Tim & Stephanie