They also do not have a proper screening process for tenants.

For newly constructed, purchased or renovated properties and also retroactive generally over the last 10 years, building components are properly classified into individual units of property and accurate recovery periods for computing depreciation deductions.

Rotting window frames, unsafe electrical issues, a tub and sink that didn’t drain properly, a promised dishwasher that turned out to be broken and unusable, a driveway with tons of pot holes so deep that they could have easily damaged cars, and much, much more.

Without having the facts it sounds like there was not proper notice to the estate. 

Also: who else has heard of the big tech installation?

Also if an LLC is not properly run it can be pierced as if yoy have no LLC.

This means the lender must (1) reject any payments from that point forth (2) comply with providing proper notification (3) allow a certain amount of time for the borrower to pay the loan in full and (4) auction the property off in non judicial states.  

Secondly, make sure you can obtain a warranty for the installation.

One time they requested that I install/repair a front porch/step railing within x days or they would cancel my property. 

One of my current tenants in Denver lists the extra bedroom as an Airbnb arbitrage and I was totally okay with that, it's his residence and as long as rent is paid and he has the proper licensing/insurance then sure.