@Fabian ****************
you also have the more expensive option of opening up a branch office here through the BOI, board of investment, working, and living here on a type B visa, with a work permit, and owning 100% of your company,and not having to hire any Thai employees, except a licensed Thai accountant, but they can be part time. If you do this, and pay Thai income tax on a wage of bt100,000 a month, plus other requirements, that mean nothing if you don't work,and pay Thai income tax, you can apply for permanent residency, and when that's approved, you no longer have to deal with immigration. Or, just get the type O extension based on retirement, and keep your mouth shut about working remotely.