Mostly I was extolling the very excellent bow saw for its merits in this situation. Inexpensive, efficient and effective even in the hands of a novice.

I never thought of putting a chainsaw chain into a bow saw frame. If it were put in an oversized 2-man-operated frame, with a turnbuckle tensioner, it might work. Better still, cut the chain in half and rivet the two sections together so each person had a cutting section on part of their pull stroke. It's just crazy enough to work.