A friend of mine did something like that. She turned the whole room into a shower. It was great, worked really well for the home. It was on the first floor, so no worries about downstairs leaks.
That's my plan! I'm glad to hear that it's worked for someone else. Mine will also be on the first (only) floor. My aunt and uncle will be down for that project. I'm indebted to them for that. My uncle will teach me through the process and work me like a dog. I'm looking forward to it.
Look at the spacing of the joists.
It's obviously an old house.
It was built mid 50s. I'm guessing it was a shore/summer cottage.