Wood isn't our primary heating source, so we've gotten by using wood from free sources. We live in a surburban area where not everyone has fireplaces (or wood burning ones) , some neighbors (and relatives) have given us fallen limbs or let DH cut up smaller fallen trees to get rid of them. A couple of times, we've driven by a house that had wood stacked at the curb for trash pickup ... the owners are more than happy to see us take it away.
We have some wood from our own trees, too ... we're never hurting for kindling, LOL