@Anita *******
your countries requirements don't factor into it.
It's what your country's embassy here will do as far as issuing that affidavit of income from abroad notary letter.
If they won't do it, in order to get the in country Non-O visa and year extension you have to use the 800K banked money method for the first year.
Then you transfer in 65k baht a month from abroad into your thai bank account, each month, every month for the next 12 months so you can switch from banked money to monthly income when you apply for the following yearly extension