Pete Beach and Treasure Island heating up, it might be worth tapping into that dormant potential.

After you paid for a hotel for your tenants for the last week while the ac, the heat or the water heater was broken.  

You are correct that insulation is almost certainly a bigger bang for the buck in a heating climate.

What we do for houses with heating oil , we measure the amount of oil in the tant ( There is a chart that tells yo how many inches equals gallons ) And the tenants pay that up front when they move in , the oil is now theirs .

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.

.: 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.

It started with heat complaints.

This includes, water, hot water, heat, air conditioning, cable, security system, snow removal, lawn care.

It was a raised foundation and they filled the floor heating vents with dog food.....you can imagine...John, which do you think smells worse - dog poop or cat poop? 

Also to reduce sun from heating buildings and for shade.