Colorado is actually a relatively heat pump friendly climate; it can reach incredibly low temperatures some winter nights, but once the sun is up it’s back to 20-40F. Compare this to months of continuous deep cold near the Great Lakes.
Using these numbers and an average COP of 2.5 (guess) you're at about 6 therms of gas per day, or about $5-6 while the electricity sets you back about $8.
When was your home built? When I was in the northern front range, we averaged maybe 1.5-2 therms of gas per day.
But yes, this is another reason I want to move. I’ve done all the insulating I can easily do without tearing everything down and starting again.
70 kWh a day sounds about right. That’s what I calculated for a max load when I was sizing solar systems.