Thanks everyone for your comments and corrections. I will make a major update of my comparison table to integrate all these comments. I will then repost again. I will also research further some of these points, as some of the comments seem to contradict each other.
Thanks again. I have learned a great deal from everyone's input!
: The information on that site is not entirely consistent with what has been stated here. Specifically, it says that OA can be applied for in Thailand, which is not what has been reported in this forum by people familiar with the visa process.
Additionally, the foreigner on a Visa Exemption stamp or a Tourist Visa can still apply for a Thai marriage visa inside Thailand as long as the foreigner has already met the requirements for the non-immigrant O visa and the one year Thai marriage visa applications. This can be done at the local Thai immigration office in the province where the foreigner and Thai spouse are residing.
I don't know if the above is valid. But if it is, it seems to imply that you can get enter Thailand with a visa exemption. Within Thailand, you can then apply for the extension of stay based on marriage.
Is this a viable scenario? If so, then it means that the extension of stay, based on marriage, is not based on prior obtention of a non-immgrant O Visa?
: I have read something about this online. I think it came into effect since Nov. 1 as part of the "re-opening". Covid insurance is no longer required, but everyone needs to have a general health insurance of 50K. This applies to people coming exempt, tourist visa, as well as renewal of most other visas (O and OA I believe).
: I was told by other Canadians on this forum that they did not require the deposit (800K for retirement / 400K for marriage) if they had sufficient monthly pension income (65K for retirment / 40K for marriage).
The Canadian embassy can provide an affidavit which proves that you meet the income requirement target. They require a statement from your pension fund and you also need to sign a sworn declaration.
: I was told by other Canadians on this forum that they did not require the deposit (800K for retirement / 400K for marriage) if they had sufficient monthly pension income (65K for retirment / 40K for marriage).
The Canadian embassy can provide an affidavit which proves that you meet the income requirement target. They require a statement from your pension fund and you also need to sign a sworn declaration.
: Thanks Michael. I am not sure that I understand correctly. Do you mean that I could apply for the marriage extension to an O visa from my country (Canada)?