The CAPM provides the famous framework for that.Glad you added the comment on "effort' because I've regularly seen where a little bit of effort can yield outsized returns, well beyond what CAPM would indicate.

The famous horror story of the wholesalers and flippers who make a ton of money doing it but they don't know what to do with the money in terms of being smart with it and they lose it all, especially in a RE downturn.

Those who succeed are those who take action on what they learn (a recurring theme on BP podcast "famous four").  

But it was my first time getting the actual famous Yellow letter that prompted my post.And the lack of any follow up... which of course you can't close a deal if you never call the seller back I think that's clear... :) And that person never did call me back.I will tell you on that same property I got the yellow letter the listing expired and I got 5 phone calls and probably 20 letters from realtors..

Besides the word "wholesaling" is so misunderstood. 

You may have misunderstood what I was trying to say.

I think you may have misunderstood or got confused by something.

Robyn Thompson's famous  "horsey letter" gets a 1% response. 

Maybe I am misunderstood. 

I guess I need practice....I think you may have misunderstood... importing construction labor from South America is often utilized by some.