Thailand doesn't offer anything like a "30-days holiday visa". There is nothing such. There are: a 15-days VOA you can buy for 2000 THB before entering - but only for selected few nations . . . There is the 60-days STAY PERMIT you and citizens of 93 nations get stamped when you arrive without a visa. And last but not least there is the 60-days single entry Tourist Visa that gets you stamped in for 60 days. . . . if you now spend a holiday, or sighseeing, or studying, or travelling around on history's tracks, or hang around in Soi 6 lady's bars, - that's totally up to you. However it doesn't give you the right to call a tourist visa or any of the above "holiday visa"
the visa itself becomes invalid upon entry, because it is a single entry visa, as far as this goes, you are right. However, for any stay permit issued you can buy a re-entry permit. So this means, when you enter on a 90-days single entry Non-O visa, you get stamped a 90-days stay permit, the visa expires, and for this stay permit you can buy a re-entry permit
this is not true. He can buy a re-entry permit for the first 90-days stay permit and exit Thailand. He then just needs to return before the initial 90-days stay permit stamp expires (because the re-entry permit does not keep his stay permit alive any longer than he got stamped in initially)
transfer the 800,000 back to your home bank account! Then apply for the visa, again, through the E-Visa online system in the USA. Because the three months bank statements maybe get accepted if the updated account net is more than 800,000 THB equivalent at the date of application, and the 3-mon ths statements are proof enough that you held that required sum over a long time
You are adressing the wrong person. Myself it never took me more than 10 minutes to get a certificate of residency. Nowadays I have a yellow housebook, I don't need the COR any more
it depends what you are asking from Immigration. If you have entered on a 90-days Non-O visa, for an application to the 1-year extension based on retirement, Immigratin won't ask for the source. For the application to the "change of visa type" on Immigratin inside Thailand, Immigration wants a proof that the 800,000 came from abroad
this probably means that your U.S. Bank used a subsidiary (Bangkok Bank?) in Thailand for an in-between step. Actualy the same WISE is doing - they have a Kasikorn account in Thailand
just get a single re-entry permit for 1000 THB either at Immigration, or for 1200 THB at the BKK Suvarnabhumi Airport in "Departure 2" right before the exit Immigration desks, to keep the 90 days stay permit alive when you exit Thailand. The re-entry permit will be valid until December 23rd. . . . . . only when you get issued the 12-months extension, it might be worth considering if a 3800 THB multi entry permit fits the purpose. Because if you don't plan to exit and re-enter Thailand during these 12 months more often than 3 times, it saves money buying single re-entry permits prior to each exit