If you can just make sure you are buying right, everything else falls into place eventually.There are markets that perform better than others, but unless you are holding long-term or building rentals, you shouldn't really care too much since flipping is all about buying at the right price for that market:

It seems like Wagner is just a broker and the issue is with the builder who isn't performing? 

I've been watching Chad Carson's videos and his approach of accumulating more properties than you need, then start using that income to pay off mortgages and cull the lower performing properties makes sense to me. 

Tough to stay disciplined as "Past performance is no guarantee of future results". 

You can determine what a decent salary would be for someone in your market and then reverse-engineer to see if what you're paying as a salary, plus the projected performance commission, will get you there.

I have worked my entire career in construction and last 2 years performing entitlements, permitting, and construction for industrial developments along the Wasatch.

There is a potential scenario where an outside rescue fund (marketed as preferred equity to new investors) could come into play in many of the projects that appear to be performing especially if they have been paying the pref (via a reserve account stockpiled by over raising funds in the beginning).

Do you have a rent roll for at least the last 2 years, so you can see how it has performing?

Are there other notes you feel perform better than these?

I can probably point to a 2-4 unit that performed better than a single family, and I can point to a my own single families that performed better than my duplex.