@Jackie **********
My immigration officer in Chiang Khan told me that I needed 40,000 baht per month for one year showing transfers by bank statements from Bangkok Bank. After one year, I went in for my marriage visa extension and he told me that there was a new boss and he wanted to see
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baht per month. Of course by then it was too late and in the worse part of the pandemic. He told me that for 25,000 baht cash with no receipt, he could get me the extension from another province. I offered him 5000 baht and he was insulted by my low offer. So I went home and did the math. For the trip to drive to Bangkok, PCR test, Cambodian E-Visa, flight to Pnom Phen, Cambodia, rapid test in Cambodia, hotel for 4 nights, Non O marriage Visa from Thai consulate, PCR test in Cambodia, flight back to Bangkok, SHA++ hotel in Bangkok for one night, one more PCR test, and drive back home, the cost was about 18,