Other risks, the contractor walking off the job, a storm hitting and delaying the project for weeks, someone breaking into the home and stealing stuff (which happened just the other day to a client of mine), a squatter, or drunk driver driving into the house (happened a lot at my old job as a firefighter lol).

The contractor will give you better pricing the more you use them, some GCs increase their price, but those are the ones you would like to not use (side note, of course with inflation you need to pay your people right, but it needs to be reasonable).

The only people that win with turnkey investments are the turnkey companies.

The bank people are either the least stable or get paid irregular. 

Yes there are some crazy places that bring the hits but most are not Polly Pockets houses or live in potatoes.

Loan to value ratio: The higher the loan to value ratio (LTV) is, pricing takes a hit.

bought some slugs for my 20 guage would not want to get hit with one of those..

Your post here, while I have not gone through the link's yet, seem's to squarely hit the nail on the head.

And at the top, you need three key people: an artist (to deliver a great product), a manager (to keep things running smoothly), and an entrepreneur (to drive it forward).

People are unloading games all the time.