We go through about 3 1/2 cords of wood between December 1st through about Feb 15th or so, depending on how cold it gets. (The colder it is outside, the more you burn to stay warm inside.)
Absent the tons of snow we got last winter, temperature wise it was pretty mild. We had a few facecords left over that we'll burn this year.
These things really only pay for themselves or have benefit if you get the wood for free (we do.) Family owns tons of property in the Upper Penninsula of Michigan. We harvest the dead trees/trees that fall over during the year, cut them and let them dry for at least a season before we bring the wood home to burn.
We have an F-250 Super-Duty Diesel that is more than capable of pulling all that wood home in one trip.
Nice woodstove and a real worker stove.
I have land, but no way to get wood. It is less for me to buy cordwood than pay for oil.
I actually buy about 900 gallons of oil to heat our water.