Bathroom Floor Suggestion

[Jacob Ellis]

Hey All! I am house hacking now and plan to turn the property into a long-term rental. One of my tenants got a lot of water on the floor during their last shower and the floor water began running through the ceiling of the downstairs bedroom. I found the floor needs a bead of caulk between the tub base and the floor, but shouldn't the floor be water-proofed enough to prevent that leak?

Should I simply caulk the seam of the tub and floor, or should I redo the tile flooring in the small bathroom and ensure it has a proper water seal if the property will become a long-term rental?