@Dave *****
In country, you need to have funds in a Thai bank account 2 months prior to applying, and it can be quite difficult to open one and then 'season' the funds in that amount of time (if you don't have account already). This is true even if you get an extension (which the poster above's email would suggest you cannot), what with quarantine etc. You might be better off getting retirement visa in your home country, if available, because then the funds only need to be seasoned in your own bank account.