SupportiveDragon2517 if you're married to thai then it's non o. If you're over 50 then it's non o. If you're entrepreneur or working class then it's non b. If you're married you still can apply non b if you run company here. Otherwise look short term tourist visas like ltr, dtv etc.
Apply multi entry non o from your embassy and send bank statements plus 15.000€ and you're safe side👍 They see your travel history and multiple is possible.