ouch - hope you got an under $2 a gal source.

Maybe too late, but I'd put in a heatpump condenser instead of a straight-cool (same size); only a few bucks more and you could heat dual-fuel for about half the cost of straight propane. Plus, the heatpump never 'runs out'.
New heatpumps are ++ efficient down to 20 degrees (way cheaper than propane). Below 20 propane kicks in. Makes 1 tank last 2+ years!
Only suggesting this because I did exactly this on a home we recently moved into.

Unless you set that thermostat at 60 during the winter, you’re going to be in for a shock. We went propane heater and propane tankless water heater in our new house, 3300sq ft with spray foam insulation. We moved in just before December, had tank filled to 200 gallons, and had to refill it Janurary 1 with another 200 gallons. Just refilled it yesterday with 100 gallons. That’s over $1000 for 4 months. My dad is on chemo right now and it makes him very sensitive to the cold, might be one reason we are using so much propane, I keep it at 68-70 and he keeps it around 74.

Also, the water heater has a recirculator feature to provide faster hot water, this uses constant propane, and it can be turned off but will take a few more seconds to get hot water.

I have always has gas heat, always been natural ga though. My in-laws have electric heat and they averaged $250 a month over the past 4 months and were on brand new units in a 2400 sq ft home.