The answer depends on the source of payment.. For me I use electric heat a lot, however I'm in campgrounds where I pay a flat rate, I do not pay for electric seperate, if I had to pay by the kilowatt I'm sure Propane would be cheaper.
But sometimes I am not in a campground.. For example, Last fall we went to Georgia for my Daughter's wedding, Stuck around till Jan-2.. Now you may not remember Jan-2 but I do, COLDEST NIGHT ALL WINTER.. And no furnace ,it was broken. And being on the road all I had for heat was the dash (or electric if I fired the Gen-set)
It (The furnace) is fixed now.
New Dinosaure control board, less than half the price of the OEM board and from the look and feel and other observations, A much better product.
Home is where I park it!