It may affect adjacent units with smells and pests. 

I have a feeling you're leaving out a few major ones in your calculations.To your question on how to value a property: any formulaic way of computing value is going to be inaccurate, as even the most precise require inputs that are a little bit of guesswork (such as prevailing cap-rate for your product type in that neighborhood.)There are some often "rules of thumb" that people use, which are usually used to pass the initial "smell test", but as you will see, will only give you ballpark accuracy.In roughly increasing accuracy and precision:1) Price-Per-Door: see what other multi-family units have sold at, and divide by the number of units.

Although I really don’t smell anything too terrible here.

The buyer's agents can SMELL weakness and that's bad.  

Go figure they don’t like the smell.

yes I’m closely following Nikola and their Tesla battles.

If a PM makes a huge mistake, they're not typically going to try to hamstring you into a contractual battle, but you can always ask to start with 6 months and then extend from there.Hope you're well, man!

So, when the person gets home, the system is now fighting an uphill battle to get the temperature back to the desired one. 

That is in my view over 50% of the battle.

You wouldn't think of sending your chopper into battle without one...REI is no different.