When I was a little wood chipper, running around limbing with a hachet we didn't have a woods of our own. We were scrounging for wood doing dead take downs for neighbors. I remember one year Dad had a guy that wanted an apple orchid cleaned out and we did that. Talk about a lot of work for little return as we burnt all the brush too. That might be why we tend to cut more now as we hate to see it just rot up when it's down.
We found out quick that you can get in with farmers they ALWAY have overgrown fencerows they want cleaned out. Do a good job and they'll keep you with all the wood you'll ever need via referrals. They always like us because we cut everything down to about 1 1/2 inches and we'd throw all the brush out in the field in rows so the could just push it with tractors/dozers to burn it up. Heck, we were just glad we didn't have to do it!
I'm in my 40's now so we been at it awhile