I thought that with the Non O A you still need to show funds in Thai bank , just not at the beginning . I thought once you enter the country and start your visa , you then need to put
*****
0 baht in Thai bank so that it is seasoned by the time you get the extension after 90 days.
you should already be registered by your landlord/landlady . So you just ask at immigration and they will check you are registered and give you a letter based on that . There was a 500 baht fee. Immigration seemed aware of the letter as soon as it was asked for. ππ