@Deborah ******
Sorry but you are ignoring the actual situation. . . he is a US citizen, his embassy in Bangkok does not issue any income affidavit. He however would need it on Immigration if he wanted to prove any income or pension. So, he can't use NEITHER the combination method NOR the income method. His only option for the first year Extension of Stay, is the 800,000 THB deposit. He can immediately start to transfer a minimum of 65,000 THB to his Thai bank account, month for month, not missing out any single month. After 12 months of consecutive transfers, for the application to the next EOS, he can use a 12-months bank statement as the financial proof. Only then, if approved and the next extension gets issued, he can take the 800,000 THB out of his Thai bank account. A US Citizen is never able to use the combination method