@David *********
That was the exact reason I recommended they get the year-long, multi-entry Non-O-A visa from the thai consulate in their country BEFORE they wing their way here.
They don't need to bank a single baht here to get that visa in their country, you use your home bank account to meet the financials, AND most of the consulates will do that visa by mail so they don't even need to go to the consulate in person to get it.
Hands down it is one of the most trouble free visas to get before you come here.