just apply for a non "O" retirement visa from your home country usually done via internet. You could pay an agent in your home country to do this, you will need some documentation over and above passport eg proof of income. This is initially a 90 day visa, once you arrive in Thailand go to your local immigration office get the list of their requirements for extension of stay. Fulfill requirements then lodge paperwork and once it's granted you only have to report every 90 days. There are visa agents in Thailand that for a small amount of money would assist in lodging extension of stay documentation and do your 90 day reporting
exactly get the correct visa and no issues, bending the rules to break point and now with DATC it's easier to be denied and then whine and winge of social media.
my account here tells me that if I leave money in home country for the year then transfer it following year it's not considered taxable. I tend to put my faith in their thorough knowledge of thai tax law they also in January attended a 2 day seminar to provide the latest tax laws and interpretation for foreign earned income by expats and the dual tax situation
the pre 2024 is relevant to money transferred in 2025. So if it's money you had before 2024 it's not taxable in 2025 next year money you had prior to 1st January 2025 won't be taxable if transferred in 2026
Rent a condo for 3 months minimum get the TM30 lodged by landlord Real estate agent. Then get to immigration for their residence certificate then to bank