Thai immigration love stamps. I was very happy with this 'visa supporting document', how they call it, provided by my embassy (Dutch). It still needs legalization by the Thai ministry of foreign affairs, so all and all a pricey document. That was Trat immigration and can be different elsewhere. But it went way faster then hoping to be able to open a bank account and transfer funds there for two months.
I have read through this a while back but thank you. I went for an option via MisterPrakan in the end. They are quick with replying, good in English. Good 3rd party insurance up to 10M baht and personal to some extend, I think its 200k per accident. Not many offer 1+ right now it seems. I will still have a look at the companies you mention, thanks again!
Thanks for the info Klaus. The Roojai looks like a good pick, nice website but they dont seem to insure people in my area code. Something is blocking the quote at least. Will try to reach out to them.