Sounds like you go through a lot of coal. How many sq.ft. do you heat?
I filled my coal bin to its capacity of 5 tons this past summer. That should do me for two hard winters. With the mild winter we have had, I have used 1.7 tons so far and will probably end up using just about 2 tons total by the end of the heating season (late March to early April). I heat about 1200 sq. ft. A little more than half of that is living space kept warm, the rest is upstairs kept quite cool for sleeping. I started burning coal in very early October this year when we had a cold snap. That is a month earlier than I started last heating season.
I pay $250 per ton delivered. That is $220. for coal and $30. for delivery, because I am 70 miles away from my coal dealer. Total coal bill for the year therefore is $500. I also burn a little keros. for early fall and late and spring heat, for maybe another $100.00 or so. Total annual heating bill is $600. to $650. per year, and that is at a comfortable level.
The heating fuel calculator indicates that burning wood should be cheaper. However for years that I had to pay for my wood, I was spending very nearly the same for heat. My coal stove must be more efficient than the wood stove was. I also no longer have to wake up to a cold house in the morning. Gotta love that coal