Please be aware that for Chaeng Wattana and most other immigration offices in Thailand, you can not use the THB 65,000 monthly transfer to have a Non O issued. Immigration only has 2 options : THB 800,000 in a Thai bank or a letter from your Embassy which most no longer do.
You can use the monthly THB 65,000 for a one year extension but not to have a 3 month Non O