@Ron *****
With OA you don't need a new visa every 2 years. I'm going on my 4 extension.
The advantage of the OA is I can keep the 800,000 Baht invested in the US. What it makes in interest more than covers the required insurance since, as an American, Medicare doesn't give overseas coverage. Since I have to bring in money monthly anyway for living expenses the OA is perfect for me.