I don't know how much wood is around here now, but when we moved in here 9 years ago, we had no central heating, only the woodburner, so we bought half a trailer load of wood, which was £35 and only lasted us just on 2 weeks.
Thankfully once I got the job cleaning at the local conservatory manufacturers, we got all the old window and door frames free. I know they say you shouldn't use anything varnished or painted, but keep the windows open a bit for extra ventilation, and when we get the chimney swept, they always say the chimney is pretty clean.
Mind you, no job now, so we lost most of the free wood, but occasionally one of their old fitters will bring some round to us!