Are there any numbers that could be better, or should be red flags? 

That is a huge red flag!

This is always a red flag to me.

@Mushfiq S.The main thing I would look at again is systematic and unsystematic risks.  2008 was a systematic downturn in RE, although some regions were adversely affected while others, like the red states in the midwest barely felt anything. 

Should this be a red flag?

For other contacts, we only notate significant conversations or observations, which we also hard copy into the tenant file.After tenant move-out we archive "problem tenant" files in red hanging folders and others in green hanging folders.

Don't know how much red tape there is in your city.  1.  

@Tingjun Lei I would put a cage around it, and I would install fake cameras with battery operated blinking red lights at the doors and above the outdoor condenser to at least make it look like you have a camera.  

Lets say its roulette, and you bid on red.

A client of his opened 1 In and Out burger and it took 1 year in California to accomplish it with all the red tape.