@Larry ******
Then what you ALL need to is to buy 90 day single entry Non-O visas from the thai consulate in your country BEFORE you come here 😮
That stamps you all in for 90 days when you arrive. Then you need to open a bank account here in your name only and transfer in 800K baht. That money needs to be in the account for 2 months before you can apply for a year extension based on retirement at the immigration office for 1900baht.
ONCE you get your retirement your wife can get a matching one (by submitting the correct documents) based on what's called "trailing spouse" <- being married to someone on a retirement extension and your child would get a matching extension based on your extension too.