Since I’m licensed, I have the power to save this money and simply list it myself.

The building will be empty at the end of the month.2) The seller started looking for a tenant, but a BP contact let me know he'd be interested in selling and knew I was interested in more commercial space (power of BP networking!)

After a property is livable (fully enclosed, power available, safe water, heated, etc.) all rents collected have been used only as necessary for property maintenance and to pay property taxes.

How do you expect them to act when they have the power and need their help. 

I have changed some light fixtures and the 240VAC water heater.I did install a double pole 240VAC breaker and run temp power out to a large camper.Haven't had the need to do do anything more.

I'm also a BIG believer in the power of local networking.

There should be a good bit of equity from the sale to allow you to move forward in real estate investing from a very powerful position. 

The power company and heating fuel providers will give you the historical usage if you tell them that you are trying to determine costs to purchase the property.

The same inflation that increased the value of our home, also decreased the buying power of the dollars our heirs get when we sell the home. 

First thoughts,Sounds like house was vacant, no power, pipes froze and burst causing water damage.