Is my visa plan for Thailand feasible with the current regulations?

You can't get Non Imm OA visas in Thailand, however you can apply for Non Imm O visas but you will each need 800k Thai Baht in Thai bank accounts and proof the money was transferred from abroad.

@Adrian *******

Immigration does not issue any more "trailing spouse" Extensions, same as many Thai embassies have discontinued to issue "trailing spouse" or "dependent" Non-O visa. You both need each 800.000 in your bank accounts, each account must be in your sole name. So what you need is 1.6 million Baht, at least in the first year. After one of you has collected 12 months of transfers (must be coded as coming from abroad in the bankbook), you can switch to the income method and take out the 800.000 THB from at least one account

In order to use the monthly deposits method, your embassy must issue a notarized wage/pension verification letter, and the UK embassy no longer does that. That is the only thing immigration accepts the first year. You can not get an OA visa inside Thailand. Your your situation you might look at the soft power options of the brand new DTV, destination Thailand Visa. It is a five year multi-entry visa. You get 180 day entry stamp on each entry for the next five years. Under that visa your wife can get a trailing spouse visa. Something to think about, because your current plan is not doable. For the DTV you do need bt500,000 in your bank account, anywhere in the world. You exit Thailand and apply for it with the e-visa system in a neighboring country. You can't get it inside Thailand.

Probably want to do some research first on your plan. #1 the initial retirement visa always requires the full 800k in a thai bank. #2 usa and UK and some others, your embassy will not certify your funds, which is a requirement, no way around that. This a all fairly well documented in this group and other online sources.

I assume you are not in ED Visas but Extensions of Stay based on education which you first need to cancel with documentation from your school. You then cannot switch to a new reason for your Extension of Stay so you exit then either get your Non-O Visas from outside Thailand or re-enter using Visa Exemptv then apply for your Non-Os inside Thailand which requires 800k each in Thai bank accounts for the initial Non-O and first Extension of Stay as above.

Apply for DTV

I think the money has to be in place at the time you apply for the OA visa

Re-plan, you cannot apply for an OA visa in Thailand. The Non-O would require 800k in a bank account for each of you, so you would need to find 1.6 million baht. You can only use the monthly transfer method for your second extension of stay. Not the initial Non-O and not the first extension of stay. (Jomtien)