@Walter ******
I was pretty sure she weren't gonna get a year trailing spouse extension on the FIRST extension from that new Non-O visa she just got based on retirement.
The rule is you need to get ONE extension from on the reason you got the visa and she got it based on retirement 😉
However
That doesn't mean that you couldn't change the reason next year. She would have to KEEP her 800K baht for 3 months after she got the extension granted and then the balance couldn't go below 400K baht after that <- to meet the seasoning requirements on the extension she's on.
THEN
Next year when you both go apply for a new yearly extension you do yours on retirement and she changes the reason for her extension from retirement to trailing spouse. That is totally within the rules and there shouldn't be any issue doing that as long as you have the correct documents