Hello everyone tonight
Well I don't know if this will worlk for you or not but quite a few years ago we had a very large elm blow down on PARKS COMMISSION property, I believe it was about 4 feet in diameter
We wanted to cut it inro planks using the 1846 muley saw mill equipment at UCV. The saw frame would handle 36" max size logs so to this end I called on the forestry crew who had a chain saw with a 36" blade, and asked them to halve the log.
They were no time sawing full length and then with wedges we split it in half. it actually worked out very good for us
You might ask a tree trimming crew in your area to do the same thing
Good luck
NH