Doesn't seem this complicated to me. Cut the branch from bottom to top with a pole saw. Tell me why not?
Why not? Because that's a great way to risk getting the bar pinched, up in space. When you free it, lots of bad things can happen. In fact, in the interest of getting it cut up and down on the ground safely, it is far preferable to work top-down, possibly even cutting it to finished length pieces on the way. Some polesaw mfgs specifically suggest not using a polesaw for felling or bucking- that provides a clue.
Other than that, in trees of any significant size, the "lop the bottom" approach, with deciduous trees, is a great way to get hurt real quick, and this homey don't play that. I like to make my own risk assessments.
Meanwhile, the OP has put this project on hold because of "warehousing glut" of wood from various sources yet to be processed. No idea when this project may happen- depends on factors beyond my vision.