Its an amusing thread
As I've said, if it was in the city I'd probably be underpinning half the house with new foundations, removing that wall completely and relocating my bathroom somewhere better. But we're working with a $25,000 ex funeral parlour in the middle of nowhere, so anything goes!
There's not enough room on that side of the house for reversing utes
Also it is only leaning 10cm at the top not falling right off, hence wanting to tie it rather than make buttresses. I do actually have enough stone spare to make a buttress and it did cross my mind. I've seen houses with walls actually falling off before, very scarey.
With the pain to get the rod here (it is mostly the cost and arranging delivery that is the issue), currently thinking the reinforcing crosses as per the ties to spread the load but instead of running a rod across, just putting through an 18 inch eyebolt on opposite sides of the house and running a high tensile steel rope through with a turnbuckle. That stuff will fit in the back of a corolla and is easy to get from anywhere that sells rigging.
We finally stood on a chair and investigated the ties at the IP. They are 5/8 inch solid steel rods, and were obviously installed as the house was being built as they go behind the fireplace and under all the ornamental molding around the doors. Much smaller house though so they have a straight piece on the outside rather than a cross, an S, an I (with twiddly serif) or the other weird ornate shapes you see the external part of ties done with round here. The old stone churches here often have two ties instead of just one (one near the top of the wall, one 2/3 of the way up) and they have reaaaaally elaborate external tie load spreader thingies.