If the tenant is not maintaining appropriate temperature in the home, you are at risk of frozen plumbing and bursting pipes.

My tenants are keeping the building at not budget friendly temperatures and I am looking to correct this.  

Entrances would be limited, and guests’ temperatures would be checked with noninvasive methods.

For example in BC the number of cases when up again, but they are mostly linked to a single seniors home and contact with a single person there.As for a link with temperature-not likely. 

If I were you I would take the temperature of the 2 markets you are trying to flip in and get an idea of what is happening in the market before you jump out there on your first flip.

No, it's just the first point of impact for international travel into the US and has the coldest temperatures.

(Upstairs apartment controls the temperature for downstairs apartment) I am looking for any advice as to what route to go splitting up the heat for this building.

Most cities follow this requirement.505.4 Water Heating FacilitiesWater heating facilities shall be properly installed, maintained and capable of providing an adequate amount of water to be drawn at every required sink, lavatory, bathtub, shower and laundry facility at a minimum temperature of 110°F (43°C).

It seems to me that the flip rate, i.e. the percentage of home sales that are flips, can be a useful measure in taking the "temperature" of a market and as a supply/demand indicator. 

It was fine for 7 years, but one day the temperature dipped down so low, a burst pipe destroyed the unit.