When should I apply for my marriage visa extension to avoid issues with my business trip in late November?

My marriage visa extension is due for renewal on 31/10. If I go couple of weeks before that will the one month stamp be from that date (for date I have to go back for the year’s extension)?

Reason I ask is that I have to go on business trip 27/11-2/12 and worried that based on 31/10 expiry date I’ll be expected to go back to get 1 year on 30/11 and I’ll be out of the country, and then have an issue coming back in.

I was hoping if I go around mid Oct that the one month extension would be based on that date, and I could then get 1 year renewal back before I have to leave the country end Nov.

Last year was first time I did marriage visa extension myself and went just before the expiry date and return date was a little over a month (27/10 to 30/11). Prior to that work always sorted my non immigrant visa and got yearly renewal on same day so this process a little confusing.

If anyone can shed any light would be appreciated, or point me to any old/pinned posts. Otherwise will pop to Krabi immigration beginning of October to see if they can clarify. TIA.