I am not sure how effective this methods tend to be.   

This even older thread comes to the conclusion that using his method will result in having to sell for about 10% below what the market should bear.

It can take years to sort out public information, ideas, suggestions, methods or strategies without understanding the basic functions and requirements of dealing in real estate.You will never find the basics of real estate fully explained in any guru book.

The expanding foam is more expansive than other methods.

Regardless of your political views, what effect will this have on the common person using the Brrr method, buying and flipping, and obtaining loans to do so?

I use the house hacking method....living in 1 unit and renting out the other to a few buddies, having them pay down my mortgage.

At about 25 offers per week, I did about 2 deals per month using this method.  

@George Genovezos   All of the usual methods can work.1) Foreclosures2) People needing quick cash3) Tax auctions4) Probate 5) Properties that must have remodeling

Because turnkey gives you NO profitable exit strategy, and your cash flow will be a LOT less, every month, for years and years, than the method I mentioned!

I just purchased a little house that will need a decent bit of work to get ready for rent (we're working the BRRRR method).