I soooo understand this story. Ya did everything you could to give him warning and be helpful. Some people don't understand reason or a helpful disposition.
My like story. A friend of my family, for quite a few years, turned on us, and became a contributing factor in finally pushing my first marriage off the cliff. (A LOT of story there...) Anyway, he was "storing" two trucks and a car on my families property, and I gave him a weeks notice to move them. He loudly denounced me and my intentions at our work place(he was working with me, at a job I got for him). I waited the week, added a couple of days, then called the local wrecking yard. They hauled his junk cars off, AND payed me three hundred dollars! Good riddance to this snake and his crap!