Yes you can attend a school on any visa type. LTR, Ed visa, visa exempt or whatever.

The school may prefer that they have an Ed visa but it’s not a physical requirement.

Yes. I believe you’re correct on that one. Only office in the country that requires that. I forgot.

Damn. Didn’t see that. I wouldn’t have answered. Coming to Thailand you have to be a Liverpool or Man U supporter……😁

Didn’t see Swiss mentioned anywhere so that why I didn’t mention the income affidavit option

For the initial Non O and the first year extension the 65k per month method won’t work. That will only work for the second and subsequent years. You’ll need a lump sum of 800K and I believe Jomtien require it to be shown as coming from overseas rather than a local transfer.

Getting the bank account will be the issue and almost certainly require an agents help to do so.

Also go to the website of the embassy or consulate you will use and check their requirements. Each have their own requirements and may differ from others’ experience who applied elsewhere

Depends on how long you intend to stay. If just a holiday scenario for less than 60 days then no you don’t.

If you’re intending to stay longer then you possibly do.

Believe that if you want.

If you didn’t follow the rules for your first extension then you can’t use the 65K method of bank deposits for the next one.

They will need proof that you followed the rules for the first extension before allowing you to switch to the transfer method.

A very grey area here in Thailand. On paper it’s illegal but so is not wearing a helmet on a motorcycle. Whether the police or immigration office enforce a law is up to them.