I just called our propane dealer. The current price is $1.40
I'm in NE KS. When we first bought the old house, it leaked worse the a screen door. Built in 1913. Snow blew in through the upstairs bedroom windows and with no heat (just the old gravity feed vents) I had a pile of snow on the floor in the morning.
I blew through 500g of propane in a month. The price back then was $.60/g. During that winter it spiked to $2.00/g. That sucked.
After adding new windows/blowing in insulation in the attic and walls, updating the HVAC, new siding etc, the 500g would last all year.
After we added on and required another HVAC I use 600g and contract for 800. The house is VERY tight. The extension was built with 2x6's instead of 2x4's which allowed for thicker insulation.
I see that your house was built in 2008, thus should be well insulated and tight. Is there anyway that you can talk to the contractor that built it?