I haven't read "everything" but I've certainly seen the majority of people saying you will need to do a 90 day report, just like all the other longer than 90 day visas.
If you leave and come back there is no re-evaluation of your DTV credentials. If you extend in Thailand, you are basically applying again and need to re-submit the paperwork to get approved and hope it still works. I'll be leaving before 180 days for the next 5 years so I don't have to stress about this.
No, I'm Canadian and don't need to move money to Thailand for visas as we can get affidavits of income from our embassy/consulate. It's just cheaper and more convenient with fewer visits to immigration and free multi entry.
Canada is another country that provides these affidavits and it has worked great for us. We did it from 2021-2023 with no problem. We let our retirement Non-O's lapse last year to travel but are starting over again next month so hopefully the Canadian consulate in Chiang Mai is still providing them. 🙂 Is there a list of which countries still do the income affidavits? I know the US, UK and Oz stopped it a few years ago.
Depends where you are from. Some countries can get an affidavit of income from their embassy/consulate in Thailand instead of transferring $ for the Non-O retirement extension. Canada is an example of a country still doing this. US, UK and OZ stopped it a few years ago.