After he left she was ok for a couple months until she went off her bi-polar meds and resumed drinking heavily and smoking crystal. 

Obviously this may result in excluding certain applicants that may have been good tenants but not having a crystal ball means I will error on the side of caution every time.If individual landlords choose to take the time to determine if a applicant, that does not meet their predetermined screening standards, is worth the risk all they must accept that they are not being consistent and are placing their screening standards in jeopardy.

Crystal

Failure means I took action--in so many ways and with education, but without a crystal ball.  

First of all, its not like this is some dilapidated "Breaking Bad" RV that looks like it's used for cooking crystal meth.

I think that as Sam Josh said, we don’t really have a crystal ball but all we can do is be disciplined in continuing to find deals at a good price.

Be crystal clear as to why you are investing and continuing to build your portfolio.  

In your case you can create a crystal clear paper trail of the purpose of the funds and the use of the funds and the receivers of the funds. 

I know no one has a crystal ball and has the definitive answer, however does anyone have any idea or knowledge of how the historical market works and whether you think we are at the peak?

Make it  crystal clear that as a professional landlord you inforce your lease.These tenants are not off to a very good start.