This is a smoking gun if there ever was one.

Every meeting there are giveaways like smoke detectors, CO detectors or gift cards for Home Depot. 

Class D is mostly rentals (another tip to look at owner occupied stats and/or if the neighborhood is identified for revitalization), the tenants are outside smoking, they are talking to neighbors and solicitors, it is a completely different vibe that is pretty noticeable just driving through.

For example, I have a tenant who has been smoking in their unit since before I took ownership of the property.

cant pull those off with smoke and mirrors :)   and of course my bank that has loaned me about 60 million to build all this thinks I have morals and character as its the cornerstone concept when lending this kind of money on spec builds.. you dont have it you dont get the money.

That’s what people loved about the great relief (closer) pitcher Tug McGrawWhen asked on a TV interview if he preferred grass or astroturf, he stated “I don’t know, I never smoked astroturf”.  

However, this is smoke and mirrors.  

While I use it primarily for noise concerns (it alerts me for sustained +80 decibels), it's also handy for cigarette smoke and tracking temperatures (in addition to our Ecobee thermostat)- sensors on all exterior doors and possibly windows (which you might have via smart locks for the doors)- exterior camsA recent guest for reasons only known to them set the thermostat to cool and 60F in the winter (where it's currently a balmy 11F). 

Broken glass lantern by the pool, smoke detector hanging in hallway, broken ceiling light in the bedroom, face plates missing or missing screws.

The 4 guests smoked marijuana in the house (strong smell), broke a window blind and a picture, put a hole in the bathroom wall, chipped an end table and worst of all vomited on the couch and front porch.