@Chris *******
thats just nonsense.. One of my good friends was recently checked by the bank, on a DTV, he said he has a condo and they were fine as soon as he produced his condo owners book.
Lots of reports of similar.. Including married guys keeping accounts. As usual it isnt a hard rule, its decided case by case.
Thailand isnt a country of hard rules, it runs on grey areas and personal connections, have a few mil in your account and they wont care what visa your on, it will be smoothed over..