Firstly you use "extensions" not "first extension".
Secondly, if the embassy does not verify income, then the second extension has to be planned already to use income, as it has to run over the first year in parallel to the 800k in the bank method.
This is actually not so onerous, as the 65k monthly deposits can be used immediately to pay expenses.
back in your box. If it's hard to open an account for foreigners, it'll be a tad more difficult to open a bank.
Actually it's this idea that created all these issues about having so much in bank for so long. Used to be just 800k for the extension, and then you could use it until the next extension.
However, some foreigners started to pool money and just move it around depending on who was up for the extension.
Apparently immigration got to hear about it, and now we have the weird amounts for random intervals requirements.
I doubt if there were ever more than a few doing it. But it backfired on everyone.