Anyone have an idea of about how big of a root ball I would need maintain to move a 15 to 20 ft pear tree? I plan to trim it back to about 10,or 12 ft before moving it but I know I need to keep as much of the original roots as possible.. the thing is its just me, and all by hand with no equipment to lift it.. The trunk is about 8 to 10 inches in diameter if that helps any..