@Kace ******
No, 800K it’s not required for the ED visa and you can also apply for a six months multiple entries tourist visa with your income at home (METV). This gives you possibility for stay up to nine months in Thailand, with two boarder crossings and three local extensions in Thailand. You can also apply for a Non O later when you’re in Thailand, but then you’ll need proof of 800K when you apply. (Sad your embassy doesn’t provide this service as our norwegian and several others do. For people married to a thai citizen the requirement is half; 400K in bank or 40K a month).