Plan) Get permits on every house, never use a GC to hang a fan, replace outlets, or work  on the panel.

I have solar panels on my rental.

If your talking about a Neo Angle framed unit (normally installed in corner of bathroom, 2 smaller panels coming off the walls, and one door on an angle between the 2 panels), and it has the little magnets in the handle that hold the door to the metal, not much you can do for those because they all rust and crap out over time.

That may have been a mistake as a tenant turned the heat off at the breaker panel for Thanksgiving and I had a frozen pipe in the wall. 

Also, something may have seeped past interior panels onto coils or some other less than obvious location which gets pumped back in.

You also need to be able to determine which wire comes from the circuit breaker panel if more than one wire appears on a single receptacle (they aren't always wired as they should be).If you don't understand what I just typed, then you should probably hire somebody and watch and learn.

We put tower cranes on hotel projects, 4-10 stories, that are built with pre-fab metal panels.

@Justin Cabral For what it's worth, I was recently at an investor meeting and they had a panel discussion on the state of the economy.

No blinds, no shades, no hurricane panels, no burglar cage...All this for $50 at The Home Depot for this fancy multifunctional window.

If a tenant is renting a 3 bedroom home, and reported that one of the rooms had a leak 6 months ago, but became uninhabitable as of 3 months ago (can’t figure out where the problem lies and outside paneling is going to be coming off to search further), should they receive a reduction in rent?