40K/month works when you have a job and work permit in Thailand because you then have a tax document from your employer to confirm that you earn 40K a month.

If you need an account for yourself, you go to the bank with your passport but you must have a Non-ED. You probably need a letter confirming your student status from your university/college. You need a registered Thai sim card in your name.

Leo Mesulam Immigration never block your money. They basicallly let you keep it in your account as you need to meet immigration's requirements for extension. However, if the bank is the one who blocks your money - change the bank!

Keep 800K for 3 months after you get a one year visa and 2 months before you extend next year.

90 days report can be done 15 days prior to its due date and you have a grace period of 7 days after due date.

Getting yourself a visa will secure that you will be allowed to enter. I know many that the officer told them "Next time, must have visa" on their second entry.

You cannot apply a Non-O (Thai Wife) without a marriage certificate.

In Bangkok, you must cancel visa first then work permit. You can have up to 21 days (if your cuurent WP & Visa's validity is over 21 days) after cancellation, but the last day of your visa must be stated clearly on the cancellation letter from the company. Once visa is canceled, you can leave any day you want but not after last day of your visa.

When you submit your documents, if all goes well you should get a one year stamp right away. However, it can be different in Jomtien but there is a LINE official account of Jomtien Immigration that you can add and check status of your visa whether it is approved so you can come back to get your stamp. A retirement visa is same day in Bangkok. Visa first then a re-entry later, it is two diferrent step.

What is the name of the teller and the branch?

If it is a renewal, you already have an account, requesting a statement and a letter confirming your balance is 100-200 Baht. If they say no, then you report them to BOT.