I assumed that when I said I needed to rehab the kitchen, I didn't need to remind the contractor that we needed electrical outlets.

Kitchen cabinet handles were placed upside down, cabinet doors were installed backwards, electrical line for thermostat was ran on the inside of the bedroom exposed, trash swept into newly installs vents from the furnace, cracked tub, wall switches were installed sideways in some rooms, wall outlets were installed upside down on some walls, list goes on.

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It's not realistic in most cases because warehouses are built as that, which means they run much less electric and plumbing.

What @Nathan Gesner said ^^^^ plus....do you have other construction skills like plumbing/electrical/tile/etc?

However I have had to replace some major appliances recently which had put my in the defecate and added to my motivation to sell (Hot water heater, two refrigerates and a washer/dryer).

So the major issues in a house are a foundation issue or a structural issue, the next tier down would be a mechanical issue like Electrical, Plumbing, HVAC, then roof - which isn;t an issue a new roof is very common in a fix n flip, and then the outside facade: Brick repair, driveway repair, brick pointing. 

I understand that a GC is suppose to have subs, but this was work I had contracted with HIM, it was not electrical or foundation work that needed to be subbed it was to him and I was under the impression he was the one working.

However, these properties generally have a lot of land improvements that qualify as well as certain portions of electrical, mechanical and plumbing that can qualify.

However I have had to replace some major appliances recently which had put my in the defecate and added to my motivation to sell (Hot water heater, two refrigerates and a washer/dryer).