The first book mentioned has really increased my confidence level as it has better equipped me to analyze the numbers.  

Also depending on your business structure- you can make purchases that are essential for your business such as equipment.

Odd..https://www.yelp.com/biz/the-verdant-apartments-sa...Fire alarm apparently goes off frequently, lots of broken gym equipment, not enough maintenance people, and someone saying that homeless people sometimes sleep in the staircase..

How old is the equipment in the store?

In the last 2 crashes, I watched as businesses and construction just halted, equipment sitting on jobsites, abandoned homes all over town, people packing up whatever they could stuff in vehicles and driving off, often in the middle of the night.

Even somebody completely ignorant to HVAC equipment/costs and only getting one bid for this work should not pay $5K.  

These low equipped me with the “grit” I needed to stay afloat and keep my head above water while the world around me, as I knew it, was crashing and burning.

Yes, there are 4 electric meters so I would have tenants pay their own electric bill, I'm guessing the electric that is recorded on Redfin is for property lights and laundry room equipment. 

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But it's still likely to be best to hire a contractor than try to DIY it without proper equipment.