I discover a water shutoff valve that is hidden above the downstairs bathroom ceiling.
Our roommate helps us demolish the rest of the walls and ceiling in the downstairs bathroom to expose the water valve.
We also find several instances of illegal electrical work.
Later we excavate trenches for the new drain pipes.
I also remove the useless and obsolete telephone wires from the walls. Previously, the cable TV technician could not figure out why my jacks weren’t working. Today, I discovered that the coax outlet plates have a few inches of cable attached to them. That’s right, the cable jacks were not connected to anything at all. They only made the house appear to be wired for cable TV.