@Steve *******
in order to use the 65.000.- THB "income proof", this depends if your embassy in Bangkok can issue an "affidavit of income", as this is the requirement on immigration. If you are a citizen of a country, whose embassy doesn't issue the affidavit any more (USA, UK, AUS) then you need proof from your bank of incoming from abroad 65.000.- THB, month for month, over a period of 12 months