@Neil *****
Too bad,
He owns the house, at least, and it seems fair to let him live in it. If not an Estate, then a Thai could directly inherit the land. But my fear is that they could evict him from his own house. Or they could lose the property in some other way with the same result.
He wouldn't be cheating. A Thai can own the property and he would have a contract to pay taxes on and live in his own house.
But, yeah, nothing is easy in Thailand when it comes to foreigners.
Thank you for checking.
Btw, I was referring to a Will.