The most important question is really: when is the burning season (when you will have to go into exile more south near the sea). It has been terrible this year.
exchange rate does help exporters but admin burden more than cancels out the benefit of no longer being in the single market. And since we are in a Thai expats group the drop in exchange rate was devastating for quite a few on non-o pension visa.
have you not seen UK 2016-2024? The current grown up governemnt with a huge majority is the consequence of on so many levels of failure including Brexit of last 8 years. £1 on
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/16 was 52.50 baht. By 1st of July 2016 fell to 45.0 baht with a later further corection to 35 baht. Pound therefore still did not recover compared to Baht exchange pre-brexit. Hardly a recovery. Same trend against € and US$ over last 8 years since Brexit.
If you become a tax resident you can be taxed on your remittances. The Thai Tax system is similar to most being progressive tax systen starting with a 0% tax bracket and ending with highest of 35% for remittances over 5 million baht pa. A Bigger worry should be if (when) the worldwide earnings become taxable and not just remittances to Thailand. In some countries like Italy the civil service pensions are tax exempt (not state pension) and you may wish to seek advice whether there are any exemptions in Thailand.