Great start, Welcome aboard! As Papa Dave say…… so get your camera out! Hope you like , that seems to derail a many of threads around here.
Yer using the wrong accounting method. The first split of wood to go in is REAL expensive. After all, you had to get a stove, chimney, saw, wood splitter, chain grinder, chain, safety gear, gasoline and mix just to cut that ONE PIECE! After that, everything is free....
Don't forget that you needed at least 4 new saws to fell, buck, limb and stump that tree. Maybe even a new truck.