There is a guy in my town who has a sawmill and sell ruff sawed lumber rather cheap. He is the only guy who will saw up a tree out of a yard. I think he must have a good metal detector.
I once took a 100+ year old oak barn beam about 6x6 and made table legs,3x3 three ft. I ran it throught the table saw, cut it half way, flipped it over and cut the other half. That was a lot of work to split it. Then using a jointer, thickness planner and table saw, I was able to make the legs. Some of the legs have worm holes, nail holes, but it worked prefectly for what I wanted. We had an old oak science lab table top, 2x5 ft, it had 4 drawers, and I made a frame work with legs for a island kitchen table. It is a one of a kind, with burn marks, students names in drawers.
Don't know of any attachments. If I wanted to use branches that bad, I would try to make an attachment for my 14 inch bandsaw.