What you can't prevent is a sober living house from opening up next door and driving your tenants away.

Walking in the front door is a great way to see if you want to go into business with them or not.   20 Questions To Ask Before You Hire A Property Manager  

It occurred to me that a couple of years ago I created a bathroom in a lake house we had and I had to put in a rear discharge toilet (sounds redundant) to avoid cutting into the slab by drilling a hole through a cinder block wall. 

There are other good uses of old structures for firefighter training that may not help you solve your problem but are difficult to simulate due to their destructive nature such as forcible entry (ie breaking down doors) and vertical ventilation (cutting holes in roofs) that you might mention when trying to sell your idea.  

Just the basic top stacked door model with the freezer above the fridge.

Unfortunately, for this company, they  installed a brand new aerobic system next door (vacant property). 

I used Zillow.com to compare some single-family homes and find homes for sale and rents in the area to get a general idea of the market I'm looking at.I found a 3 bedroom, 2.5 bathroom home selling for $290,000 on Zillow.com.

There is incredibly complex things happening behind the doors of a bank.

In Los Angeles, there are law firms that pay people to go door to door and try to get tenants to file big lawsuits against their landlords.

Most around here are looking for a min. cash flow of $100/door per month (single family rental), multi family rental would get more (~$250-$350/door per month).