You have to supply heat, it has to be set above a certain temperature, In commercial, the landlord is not required to supply heat.

Other thoughts to consider -  it might be good to add a dedicated water heater and heating/cooling system to the ADU - so you aren't fighting with the tenant over the temperature or who is using too much hot water.   

Missing insulation under the roof, minor roof damage, A/C temperature difference in half the house, no cable hookups anywhere in the house, doors not up to pool code, and a few other minor things.

The water temperature is inconsistent... and ?

You have to walk the scary basements, figure out the confusing locks in the freezing temperature, talk to neighbors, make quick evaluations of roofs, electric, flooring, plumbing . . .

I don't know much about South Dakota, but if you are  FLA native, then Miami to SD could be a real culture/ temperature shock. 3) I don't remember who said this first, but I have heard it several places (Jason Hartman, Robert Kiyosaki, ...) 

I am taking the temperature.

Ask current manager for the owner and tenant ledgers Contact current tenants to gauge their temperature and to see if they need anything. 

I'm not completely clear on how these things work.Although this summer has been unusually hot, my experience as someone who was born and raised in the PNW is that the mild temperatures in summer and winter are usually a great selling point for out-of-staters who move to the area.Go 'Hawks!

We plan on listing in late January/February, so we opted to schedule the exterior tasks (for curb appeal) immediately (exterior painting, exterior lighting, windows), so that the exterior of the property is presentable before we reach freezing temperatures.