I haven’t seen any longer term studies done, only promotional info when the RE market was generally rising.  

3 recent national studies show that the rent to value ratio is at an all time worse (what they really studied was cheaper to rent than buy, but there is strong correlation).  

The solution I give them is to narrow their focus on a specific market, study it, and get to know what a good deal looks like.

I'm new here and I have spent a couple of years studying real estate investing strategies.

But I've watched a lot of cases carefully & studied enough of the law now to know there are ways to fight it in court.

Another favorite of mine is Rich Dad Poor Dad by Robert Kiyosaki—it’s a classic for mindset and strategy.

Study the market.

I really can say that everything needs to be perfectly handled without any room for error.However, you do not need to go and study all aspects of Dodd/Frank, Safe Act, Senate Bill 43, the Property Code, the Finance Code, insurance law and all case law regarding wraps. 

Have you completed a geotechnical study & are the soils good?

After dealing with this situation for quite some time I started studying scams, frauds then human behavior then cults.