Tree size aint the problem, access and exposure is. Its on a bank so steep that any piece let go would ride its way into the house 120 feet below (heck an 020 would do the trip if you tried to place it down on the ground anywhere around the tree). You could use a chopper to piece it out but theres nowhere for it to process the debris unless you closed the road (which you wouldnt be allowed to do.)
Each bit has to be rigged, cut, retrieved and taken about 100m (alot of that by ladder)