What do you pay per day in utilities? $30/day here
$125 last month-- less than 5 a day. Electric heat and gas for water in a 2800 sq ft house.
Brand new construction high efficiency hot water heater and heater. 60 when we are out, 68-70 during awaking hours and 65 at night. I am a light Nazi. Never sue hot water for clothes washing and dish washer is high efficiency.
I suggest the windows and resealing doors. Also check under your sinks for big holes aroudn your pipes that may allow cold air to creep in from your basement.