Perhaps the difference between the lumber cost and the replacement cost? Replacing an old, large tree can easily get into the six figure ranges because in most

Perhaps the difference between the lumber cost and the replacement cost? Replacing an old, large tree can easily get into the six figure ranges because in most jurisdictions, you'd have to replace like for like. So to replace a 100 year old black walnut, you'd need to find another 100 year old black walnut, transport it, transplant it, hope it survives (so you don't need to repeat the process.)