Apply for a non o visa in Hanoi as this gives you 90 days. You need ฿800,000 in a thai bank account for the subsequent extension.
If you wish to use the ฿65,000 per month rule you need to deposit this every month for the 1st year and you can apply for another 12-month extension in the 2nd year
@ANONYMOUS MEMBER Why do you think you need a TIN? You had professional advice, no dont think so or they would have arranged this. I really believe you should get professional advice