This includes operating your heating and air-conditioning system as appropriate to reduce humidity, using appropriate ventilation, limiting evaporation of water, promptly removing any visible mold, and immediately reporting to us any leaks or other water intrusion into your apartment or any visible mold that you cannot remove.

The AC/heat is out? 

What is your roof goes, a heating unit.... you're credit card debt could build up quick as a result of this putting yourself in a bad situation.

The one we have isn't as fancy and it cost over $600 10 years ago.What is really nice about this one is the heating jet.

.: Quote from @Brandon Brown: I am considering switching to a heat pump with an electric heat strip for supplemental heating in our two-flat building, with plans to add a third unit in the future.

If you have zero vacancies, zero tenant damage, make sure utilities (especially heat) stay on every winter even if the tenant doesn’t pay.  

Otherwise contract a service for the season that will automatically take care of for every snowfall.4) YES you need to heat them!

Nothing spells trouble more than one unit having the heating/AC controls for BOTH units.This property is in Denver County.

I looked at something similar about a decade ago which was some camping log homes in upstate maine which was a beautiful place but the place did not have power (only generator) and heat was via fireplaces.

I needed $35,000 for a new heating system so the bank gave me $28,000 (80%) in a business loan for 60 months which has no prepayment penalty.