@Peter **********
not unless his embassy issues the income from abroad affidavit 😕
If he's from a country that doesn't issue that letter anymore (US, UK, Australia) or from one that never issued it he can't use monthly income from abroad (by transfers into his thai bank account) for the initial 90 day Non-Immigrant visa OR the first year extension. To use that you have to show the previous 12 months of incoming monthly transfers for the minimum amount.