Threats to property owner

[Kenton C.]

Hi BP,

Question about owning buy and hold single family homes. Is there such a thing as having too much rental property as passive sources of income? The reason I ask this is I am wondering how macroeconomic conditions such as the 08 crisis affected vacancy rates and those holding and renting out single family homes.

If for some reason, I cannot find a tenant for a long period of time 6+ months, what are my exit options? I can pay for the mortgage out of pocket, but what other exit opportunities do I have? 

Thanks!