@Peter ************
yes she needs to be with you.
You are now stamped in for 90 days. And when your Thai wife returns in October ...you can apply for a 60 days Family visit extension.
Make sure your 400,000 Thai baht is in your Thai bank account in your name only TWO MONTHS BEFORE you apply for the one year extension of stay.
Timing is key to this...
Be careful with your timeline to accomplish this.
NOTE THE UPDATE I MADE..
As you entered Thailand on a Non O Married...for 90 days...
YOU DO NOT NEED TO SHOW THE 400,000 as an International transfer...just make sure the funds are in your sole named Thai bank account TWO months BEFORE you make application for the one year extension of stay.
Thank you
@Tod ********
for your wise advice for the OP ๐