he simply asked an immigration officer what would be required for extending in country. The officer replied that you'd have to again show financials and other documents and suggested briefly going out of the country was a better alternative.
I think the part about the affidavit isn't accurate. I'm from a country that doesn't provide it, and I do the monthly transfer method. Why would they need an affidavit if the actual money is coming in?
As others have pointed out, immigration, and not the MFA will decide what's required to extend in country. Other visas I know about require you meet most of the same parameters as when you applied, and cost 1,900 or so. I expect this one to be the same, but who knows?
If it is the same, in county extensions will be 1,900 and will require you to show 500k in the bank, and if soft power, that you're still attending class.
They don't have the wherewithal to do that kind of thing at the airport or land borders. So leaving the country every 180 days might be the better option.
my payments have varied widely as to the day of the month, but I've never had a month with no payment. Yes, that would probably create a problem in many offices.
I think most offices would prefer not to have to add it up. Some offices want the funds to be from some kind of pension. If it comes a few days off from one month to the next, just say it was a bank holiday, or the government sent it to the wrong place, or whatever.
Personally, I've varied the deposit dates wildly and have gotten no grief in my particular office, as long as it's 65k every month.
it's possible. But do they check to see if you're still enrolled for an ED visa? Do they check your bank balance for a 'retirement' or 'marriage' visa? I think it's beyond their capabilities at the airports and border crossings.
that's the way it works for other visas. When you extend at immigration, you must again meet the requirements. Leaving the country though, I don't think you'll need to prove you're still attending a class.