I gave him a date to have the place heat treated and he said he would be out of town and can’t get things done in time.

The other big thing would be heat source.

We also put in new furnaces and separated the meters so that tenants pay their own heat.

You would need to add a heat source in it if you did by some miracle get the work approved. 

I've used one of the older Nests for a couple years in an Airbnb condo at Lake Tahoe to control the heat.  

Ductless heating works well here, but I'm worried about tenants breaking them.  

If there's just 6 right next to each other and you can get to the basement(s), it might be more feasible.If the current system is too complicated, might be worth considering to:Split out the electrical, upgrading service and adding min-splits for heating/cooling. 

I have a rental property about to go on the market and we have propane tanks and not sure how to structure the payment of this.  We will be providing the new tenant with full tanks because we are changing providers so...

He gave me a rough number. it does not include insurance and interest, so I plugged the insurance in the "other cost" excluding maintenance fees and vacancy.Estimated mortgage payments on 7/1 arm with 3 year prepay$2,182.00 excluding principle and Interest built into the loanMay need a personal loan of 30kRent a year$50,400.00 Monthly$4,200.00 A list of all Annual Expenses estimated run downWater/sewer/trash$2,200.00 Gas Heat$1,440.00 Common area Electric Annual$60.00 Insurance$2,920.00 City License 75.00 unit= 525 years$525.00 Management fee at 10%$6,000.00 County Tax$4,028.00 vacancyMaintenance feesThe other cost breakdownwater/sewer/trash bill$2,200.00 Gas Heat$1,440.00 Common area electric$60.00 City License$525.00 Total$4,225.00 not including maintenance fees

In the winter you will have to either heat it or winterize it which is going to cost you.Are you able to develop any of those 15ac to salvage the deal?