Just curious...
...when they look at your 40,000THB a year the "ngern fahk", are they just looking for a list of months with about 40,000 being dropped in, and not bothered if it all stays there? Do they care about outgoings?
...it makes me wonder... would it make any difference if you just recycled the same 40,000 from foreign bank into thai bank account, then out from thai bank into another foreign bank account, and then back to the first foreign bank count, and then round and round again 12 times?
Basically set up a round robin of automated payments, with an occasional top up to cover transfer costs? ...just curious.