I Know this is this the only official regarding thing. But I also know several Norwegians around have had problems regarding this and have to get new updated affidavits.
I advise you to check this up with your immigration first, as some immigrations only accept a affidavit within the last 30 days. Just so you don’t risk to get short in time.
Yes I’ve registered that you can’t by credit anymore, but I call unlimited from Thailand to any telephone number in Norway for one month at approximately 10 USD.
Don’t worry I got it too and was in the bank today. Just updated my personal information, address, telephone number email address. Tok a new copy of my passport and I answered several questions confirming I was not a US citizen or had a green card. No questions regarding Tax as I’m just here for 7 weeks this year.
Where do you live in the US? Go to the website of this embassy/consulate and check the requirements for a Non O visa. As said you probably will be able to apply based on a combination of funds and income. Most embassies allow this.
As said you’ll need to bank the required 800K baht for your first year extension of stay. Regarding the combination method for the second year it’s a bit immigration dependent. Several immigrations allow it, but not all.