Plastic on the windows is always my first line of defense against the cold. Then I use “draft dodgers” in front of every door for every room. They help immensely.
Then I wrap the water pipes closest to the outside, as well as under the sink, and also use a “blanket” for the water heater.
Just those few things can make all the difference in the world in how much heat escapes. Good luck with it. And you might want to check with the power company about the rebates, then tell your landlord of the incentives. He might be interested.
well.............he’s 70 and says he can’t afford it. Since the property taxes are $24,000 (80 acres), he might be telling the truth.