The trouble brewing within the unicorn world could lead to much slower employment growth at best, and layoffs or failures within a not insignificant percentage of that unicorn list I sent (a higher risk within the thousands of smaller angel & VC-backed startups) at worst.

Failure is not an event.

If you are using a zero vacancy as the basis for your calculations, you are setting yourself up for failure in this business.  

Hello, I have a problem tenant and the latest is I have a failure to pay rent judgement against them.  

Minimal disturbance to your personal life, no long term commitment, fairly quick "success/failure" feedback, and you get your feet wet and see if you even like this business.  

Unfortunately, the failure rate for new licensees is very high.

Once the DSCR is on the table, failure would be clearly my fault in mismanagement !

Failure is not an event.

There are advantages, but it's a tradeoff.Always, one-roof, many doors will have better return and lower risk, since a single tenant failure or move out won't bring the property income to zero and hopefully will still keep it at least alive if not cash flowing.

Often times those types of inquiries ("reverse inquiries") are met with failure.