Why not invest in particular stocks for example ......AT&T (T) is currently paying an annual dividend rate of 7.85% (Price $26.50) or Exxon Mobil (XOM) which is currently paying at an annual dividend rate of 10.60% (Price $31.57) or REIT's which have been hammered by COVID.
Sounds like B-------T. I'm here on a retirement extension also. I closed my Bangkok Bank and open (the same day) a Kaisikorn bank account. Immigration didn't say anything like that. They just needed to see my old Bangkok Bank book and wanted copies.