I would say the building is "moderately" insulated. I've been adding more insulation each year as I have been able. R -30 for the attic and each wall has it's own unique r value. But the immediate living space is insulated the most; R -30 walls and r-30 ceiling. The doors are where the biggest air leaks are. More insulation would certainly help.
Sounds better than my house :) And what temp do you keep it at, on average, in the winter?
I'm kinda trying to figure out if your house is comparable to other 1200 sq ft houses or if the "pole barniness" of it causes the heat needs to be much higher than a normal house.
I go through about 4 cords of medium-low grade firewood each winter. It's generally a fully dry mix of pine, birch and poplar. My house is R30 in the attic but around R4 on the walls. It's 1500 sqft with a full basement under it.
I'd do better with more wall insulation and some oak to burn. I also keep it in the low 60s.