and in that I listed 800k for 3 months after previous extension, never drop below 400k, and bring back to 800k. Since the op specifically says they already did the 800k for 2 months before, I didn't specifically call it out
You shouldn't be required to stay in the city. You just need to stay in the country. Just be aware that the embassy can request you come for an interview, even if it's rare.
I'm not sure what you're asking. A statement alone is not enough for immigration. You need a bank letter. And now Bangkok Bank will only give that letter if you've had the money in your account for 4 months or if you sign a document that lets then freeze that money for 4 months if it hasn't been there long enough.
border pass is only valid for 3 days I believe which may not be enough time for him to get his visa. She also can't leave the province. Not a good plan.
Why would she have a problem? As long as she has a passport she will be visa exempt to get into Laos. You will probably have to pay for visa on arrival for yourself though. You might want to apply online before you go if you have time.
This is a uniquely Bangkok Bank problem. They're the only ones who require this 5 days. They have to request and receive the statement from the headquarters for some reason.