1 A nursing home in Thailand should cost less than the west & it wouldn't surprise me if the service would be better.
2 Some of the Thai hospitals have a very good reputation, although obviously those costs have to be paid somehow, whereas many of us expect free care in our home countries. [In the case of the UK, there is no sign of the political will to reform the Soviet structure of our healtcare system, despite the queues resembling those seen in Eastern Europe pre 1989. So I'm not convinced our healthcare system will maintain any kind of advantage. Many other western countries have a larger element of competition, so no worries there.]
So I think an open mind to Thai nursing homes is best.
Also, any of us planning to have a Thai boy care for them AND ensuring he stands to make a financial gain from our death needs to be aware of the incentives that this creates. Most people will be of good character, so nothing to worry about with them.