I'm going to do similar. I legally haven't filed a tax return since I retired here, due to the previous 'not remitting income in the same year it was earned' rule. That will change under the new guidelines though, whereby, if things stay the same over the next few years, I will be required to file one.
At the end of 2023, I transferred enough to live on until the end of 2026 into a since untouched overseas bank account, so will not be obliged to file a return until early 2028 - for the assessable money I will need to remit in 2027, and could have an easy, tax-free life till then. However, I am going to remit assessable income, with a value just over my threshold, each year during this period and file annual returns based on that. I have two reasons for doing this:
Firstly, by bringing in the extra each year, by 2027 I will have built up enough here to get by with a much smaller remit that year, meaning far less tax to pay then.
Secondly, I will have established a fairly low assessable income pattern over the next few years, for which I will have the paperwork should they choose to audit me again. Sometimes it's better to intentionally fly above the radar and be identified as a small player, than try to fly below it and risk being caught out. Sure, if the law does change, or revert back to the good old days, then I will lose a few thousand baht in tax. However, if it doesn't, then I will make quite a saving.
In January 2028 I will assess the situation based on the then interpretation of the law. If things haven't changed, then I may become a non-resident that year while realising and remitting another capital gain, lasting me another three years, while continuing to remit the small amount each year once I go back to being a tax resident. Rinse and repeat over a four year cycle.