Generally, wood within human spaces isn’t usable in construction. The issue is nails and such that the tree grows around and incorporates. The human-made objects lodged within tend to chip the very expensive saws and such used to commercially process large trees. Artisans often don’t mind it and work around the issues if they want a particular piece of wood, but you’d need to advertise harder than a single Craigslist post to find one to take your entire tree.