They couldn't afford the place so you offer to trade work for a lower rent, which is a signal that they can manipulate you.6.

Just found out another receptacle with same signal ("hot/neut. reverse") which I had been using for a while now without any visible issue.Should I reverse the wiring at the receptacle (I guess preferably at the source)?

Personally, I would probably take this risk in this situation so long as they do all the above and sign all the above.Also keep in mind that they need to make sure the storm shelter is installed property, doesn't flood or cause flooding, doesn't hit a natural gas or plumping pipe, etc.

On the other side of the fence it could signal to the seller that you (as a buyer) have options.  

And as we all know, they do from time to time.The App is great but too many things can go wrong (no signal, lost the phone, forgot to download the app, don't know how to use the app, kids using codes and phones, Bluetooth what?)

Let me give you an example to make it crystal clear: I needed to replace my car passenger side signal lamp.

Currently 'Letters From A Stoic' by Seneca Recently 'The (Mis) Behavior of Markets' by Benoit Mandelbrot, 'Keynes Way To Wealth' by John Wasik, 'The Signal and The Noise' by Nate Silver.

I'm seriously considering trimming a tree on our property just on our side (limbs encroaching our house) and leaving the rest of the limbs that are encroaching on hers simply to signal that we don't HAVE to help her and I'm feeling awfully... unfriendly right now.

You will have to re sign all your disclosures to reflect the change.But this is an easy fix if you want go the 30 year route.  

Advise the cable guy, phone guy etc that you want all locations terminated and live this way where ever they plug into will have signal and again avoid any future hacking.