What Are the Requirements for Renewing a Marriage Visa Extension in Chiang Mai?

Hello everybody, question regarding Chiang Mai immigration specifically.

I've searched the forum but didn't find the exact answer I'm looking for.

Applying to renew a visa extension for a successive year, for the reason of 'support Thai wife'. Using the 400k seasoned in the bank account as proof of funds.

I got the statements and letters, and updated my bank book today (Thursday). Going to apply on Monday. I've assumed (perhaps incorrectly - please let me know if incorrect) that I can use the letters and statements for 7 days.

Here are the questions:

Do I need to update the bank book on the same day that I apply for the visa too, or can I use the version dated today only?

And, for bonus points: what's the wait like at Chiang Mai immigration for a marriage extension nowadays? Do I need to get there crazy early in the morning? I'll have a 2-week old baby with me all day too so hoping to make the process as smooth as possible.

Thanks in advance