Copper wire conductors in NM sheathed cable or in rigid metal or PVC plastic conduit has been the norm since the mid-1970s, and there are currently no new innovations in the wiring materials themselves.Most houses I have issues are from the 1950s old rag wire with no ground the cloth is brittle from heating of the current over the years.Lots of flippers will cobble together a house, install new wire where they are forced too leave old rag wire to rot away.

What you did works, but you are wearing down the metal, so it could increase resistance or loosen the connection. 

(Ok, perhaps that's a little too pessimistic).It's just when I look at my portfolio I think "man, I should sell that (real estate, stocks, forex, metals) before it drops like a rock" and then do what with the money?

You don't want to waste too many blades cutting through the metal on a refrigerator, because a pack of blades is easily $10-15 bucks these days!

I have always been good with my hands wether it be cars, wood, metal, electrical, or plumbing I've had my paws in it.

Roofer #1 only uses PVC, and tells me he'll wrap it over the low parapets and put a metal angle over the outer edge and wrap the PVC around the chimneys.

-All wood floors refinished and walls and ceilings painted 2013-2015 by Olek construction- Installed new city water and plumbing 2013 by Venhoff Plumbing Co. and Louisville Water Co- Updated all electrical, included box, added outlets, switches, ceiling fans, & more overhead lighting,also fixed any electrical issues that would be considered not up to code 2013 by Allen Electric- Chimney cleaned by contractor and Buck stove completely restored by Chim Clean Contractor 2015- New roof work and new Roof coating for metal roof by Stanley Allen Galaxy Roofing 2013-New Sunroom with energy efficiency windows, walls and ceiling insulated with concrete flooring 2014 by Carpenter Jeremy Smith and Victors Concrete Co 2013-New Washer and Dryer 2015 -Painted complete exterior of house and caulked all windows Anthony Dean Painting 2014This and more is all documented for tax purposes.2.

Owner shallfurnish a certificate annually that such coverage is in full force and effect at all times.Owner agrees that at all times during the continuance of this Agreement , all bodily injury,property damage and personal injury insurance and any other coverage carried by coverage carried by Property management company.

Are they some type of metal  (which I always imagined to be quite expensive), or what? 

It has a gutted master bathroom, a rotted porch, a bent metal fence, needs a new pool liner and equipment, paint, new carpet, and cleaning.