You are correct about the 90 days. When I applied for my visa (non imm o) in mid Oct the Embassey said I could to extend my visa two more times in Thailand to a max of 270 days or apply for something different while in Thailand. Not sure yet what to apply for but going by what you said sounds good, thanks Steve
I’ve just done the process and arrived in Thailand yesterday. If you are married and apply for a non immigrant o visa you have to show three months statements and can only stay in the country for a max 270 days. If you apply for a married visa you have to have 400.000B In thai bank. Hope this helps and good luck.