0 has remain in your bank 6 months before and after. With a 1 year OA the money will have to stay there. The rules were changed either during or just after the pandemic.
I read many questions on this site and it amazes me the amount of people that try to rort the system. You are a guest in Thailand; remember a guest. Please do the right thing and follow the laws of the country. If one can't why go to Thailand.