How long does it take to get a Non-O 1 Year Marriage Visa extension in Khon Kaen, and can I also get a 60-day extension based on marriage?

Okay, now I know what you're asking

you are now on a 90 day Non-O entry stamp, and you can apply for a year extension any time you have 30 days or less left on your current stamp, <- that means from a month before the stamp runs out right on down to the very day the stamp runs out (which is not recommended 😉 )

As long as you meet the 2 months seasoning requirements on your funds in the thai bank account in your name only you can apply any time