And that's strict...that's how you get the biggest return and make it worth while.Is this is the same strategy for BRRRR?

This sector is the biggest eater of margins and can decide a profitable holding versus a loser.

@Dario Furman the biggest question is why you would be interested in this bow wow.

I just finished reading Turner & Dorkin's "How to Invest in Real Estate".My biggest weakness right now is understanding how to evaluate offers that I see online (eg on loop net).

It'll be a regional bank doing them for a loss to build karma, or to check Community Reinvestment Act boxes, that sort of stuff... still kicking and screaming, but they'll do it, they have some incentive other than making a buck on that particular loan (they won't). 

My guess is that he is going to want to spread these out over a couple of years so that the down payments both will cover the recapture tax and at the same time not bump him up into a higher tax bracket.The biggest mistake I hear of people selling with owner financing of some kind is not considering or under estimating the recapture taxes.

There are some very good discounts on single-family at the moment which leads to the biggest thing to pay attention to - price - You make money when you buy, not when you sell.

The biggest issue that I found was power.

Companies have no incentive to allow you to accidentally create an MEC. 

Not all RE markets are impacted by foreign drivers, but rather the biggest markets, especially over the last decade or so.