Yes, you "should" be okay... but... don't forget where we are... 😁
Some immigration offices accept this method as long as the amount is shown on the same day in both accounts (out/in), what it normally is here. But... you have to ask first, that's important. If you are in the "400k phase" the split method is the safer way... transfer 400k today, the other 400k tomorrow (or later) and you are absolutely fine.
No, they don't care where the money (800k) came from, not for the initial Non-O, and also not for the extensions. Again... if you do the monthly transfer (65k) then that has to come from outside the country.
You might not understand that there is a difference between "freezing" the money for issuing the bank statement and frozen accounts because wrong visa, wrong name, wrong phone number, suspicious activity, etc. These people cannot access their money (no app, no atm, no debit card, not over the counter) until the bank "unfreeze" the account. Some people even have to travel to the branch where they opened the account, some are more lucky...
Yes... that's pretty much my second version... but you have to clear it with your local immigration first, because technically you break the rules... 🤔🙄
You have two options... you can move it in two steps when you are in the 400k months... move 400k to the new account and keep 400k in the old for at least one more day before you move it. You need to show bank statements from both banks for your next extension. Or... but that depends on your local immigration... you can move the 800k in one step if it appears the same day in the other account. As said... you have to ask your immigration first, if they'll accept it...