Computers can calculate square footage, number of beds/baths, and other objective criteria, but they can't measure the subjective things like curb appeal, flow of the floorplan, view out the living room window, or the grating irritation of four barking dogs in the neighbor's back yard.Learn to study the market and how to evaluate properties on your own.

If that doesn’t work you may need stronger measures of damage and eviction.

Most of my tenants pay close to $20,000 a year in rent, it’s a small price for me to pay to ensure their safety. 

The exception to that would be health/safety items required to rent/occupy is such as GFCI outlets in appropriate locations. 2.

Safety and quality of life can/will be influenced by your tenant.

@John Kubilis main reason you want a legal bedroom is fire safety.

Not sure if it is a scam or if it would pose potential safety/privacy issue.

These could be valuable for future investments while you have a good safety net of having a steady place to live. 

One thing to keep in mind is your thickness (millimeters) and wear thickness (mils)-Millimeters are used to measure the thickness of vinyl flooring planks, while mils are used to measure the thickness of the wear layer on the surface of the plank.

If I could not find one on a property, I would note that as a safety concern and would highly encourage adding one for the safety of the home owners.