@Jeremy *******
You have a point there. This visa arrangement would be a very bad idea for anyone on a razor's edge budget (i.e., people who don't have tens of thousands of dollars in reserve at all times) because they will inevitably start spending down the 400,000 baht to live, and if they don't have a way to replace everything they've spent, when the next time comes to prove 400K in the bank, they've got a huge problem. And it would be ten times worse because they'd be married, and now they've got a wife depending on them and they'd be risking getting deported.