-It rained, and the water from the rain stayed on the roof, up until 5 inches deep in some places.

I would suggest not trying to re-invent the wheel.

Pace isn't reinventing the wheel.

The Drywall Hack from Way Back is past its expiration date.Drill some small, easily patched holes and take a look down the stud bays of the wall in question (they will typically not be wider than 15 inches) before you start in on the major wall surgeries.

Heck with 40k you can buy a SF with seller financing and learn, much better to actually DO and learn vs reading books or listening to some guru Hey all, I see so many posts, " I am researching, " I am doing my homework" , I am trying to build my team" "Deciding on which area" So many are TRYING but never do anything, like a hamster on a wheel, A LOT of movement but staying in the same place.

And if your property manager is asleep at the wheel, fire them and do it yourself. 

Called out the ground around the house for not falling 6 inches in 10 feet.

Remember your first bike ride without training wheels? 

The barrel is a bar cart on wheels I think they call it which I will use as a wine and whiskey rack which is cheap to do.

That new flat screen 60 inch TV you need for "zoom calls" might be a write off if your actually using it for zoom calls.