I do have a Bangkok Bank account and i am looking to move to Thailand in a year or so as a retiree.

Is it possible for me to start transferring ฿65k each month to that account now, and during the year, use some of that money on regular tourist trips.

Then next summer apply for the “retirement visa” using the monthly income method right from the start?

I know that the common method is to get a regular ฿800 000 deposit to start the extension, but I cannot find any information if you already have proof of 12 month regular deposits to your Thai bank account, that this can be used as basis for your FIRST extension.