A tip of advice, work for a placement that best allows tapping into existing waste lines, water lines are no big matter to run distance but waste has strict plumbing code that is distance impacted, as in inches matter, seriously.

I guess your lawyer has tapped into a new way to make money from real estate. 0 down, 0 risk, 0 tenant problems, pure cash flow.

For kitchen make it a nice backsplash and one of those stupid squeeze pull down has the coil deal taps.

She is just the face and they tapped into the niche market of innocent inexperienced Christian women

I like to permanently fix by connecting to sewer tap.

Have a legitimate reason (clean gutters or fix a leaky tap etc.

However, even if the overflow was wide open, I do not think it would have the capacity to drain at the same rate that it was filling if the tap was fully open.  

There was a beer keg tap INSIDE one of those walls.

Reason for flooding - someone left the upstairs bathroom tap open.

Some people walk very "heavy footed", some people unconsciously tap their foot, pace back and forth, etc....even just dropping the remote control for an xbox can make noise that sound like you are dropping a hammer....the area rugs will help, but, sometimes the downstairs tenant cant handle living underneath, sometimes the upstairs tenant can't manage to not be a naturally(unintentional) noisy neighbor, and other times one of them is just a psycho.Of the hundreds of tenants I have had at that building, I would say most try their best to walk softly and be aware of the neighbors(especially if you have soft way of encouraging that type of empathy), and the ones that are not good at living below people, eventually move.