Not sexy but it's fool proof.

For existing homes and earthquakes in so-cal, and as a structural engineer, I can tell you that nothing is fool-proof or guaranteed.

The description kept mentioning a fool proof system, and then the pricing for it was exorbitant.

I use Craigslist to see what other people are renting their rooms out for, but this is NOT 100% FOOL PROOF!  

What about Bitcoin, While block chain is a great idea, it is not fool proof.  

Though I wouldn't want to say any method is foolproof becuase probably nothing is. 

Of course there were people that were there thinking this was a "fool proof system" and probably not a penny in the bank.

While credit scores aren't foolproof and they may disqualify some poor credit candidates who would've paid rent,  it's necessary in order to avoid the odds of getting into a bad tenant situation where they can cost you months of rent.

My thought is choose a higher income, high quality tenant especially in CA and don't listen to any sob stories (not 100% foolproof but reduces the risk). 

I'm not saying its foolproof, but it will go a loooong way in reducing the stress, time and effort you are going to put into starting a home.