@Mike *****
I agree. Why bother with all the hassle of a DTV if they only want a trial period, and if they want to retire here (and are over 50), a retirement visa makes vastly more sense (and more security long-term). Arguably, the only real disadvantage of having a retirement visa over a DTV is if that person is still working (remotely), but the reality is that if someone is working remotely, the chances of there being an actual problem with immigration are next to zero (if that). I think that I saw something about those on DTV being exempt from Thai tax if they have foreign income, but I don't know if that is a universal exemption or for non-tax residents only