There's no such thing as a tourist visa on arrival. If your passport qualifies for visa exempt then you'll receive a 60 day entry stamp if you arrive without a visa.

There's no issues as long as the embassy doesn't ask you for proof of your physical location again.

You don't say what type of extension so it's impossible to answer your question.

@Glyn *******

there's no way to answer that question. What one embassy might accept another might not. Each embassy gets to make their own policies on this type of thing.

@Jacques ****

I don't know because I'm still a while away from retirement visa. I just know that retirements vary by province. But you also can't shop around where you'll apply.

@Julia *****

reading every post in multiple Facebook groups for years

Depends on what immigration office you're using. Some might require a long term lease while others won't.

@Thomas *****

unless you're over 50, the only long term options you will have are education and DTV.

You cannot get a work visa without already having a job, because you need documents from your employer in order to apply for the visa.

You can come as a tourist and look for a job but you're not going to be able to stay long like that.

DTV is an option but it's a waste of money if you'll need to be on a work visa because the DTV will likely be voided by switching to work visa.

In Bangkok, you can apply for extensions when you have 45 days or less left.

As John said, the form you are looking for might not exist anywhere except for the immigration office you use. Some offices have their own forms that don't match what you can find online. And even if an immigration office uses the one you find online, they might still reject it because you printed it on the wrong size paper, or printed on one side when they want 2-sided, or you printed 2-sided when they wanted 1-sided. A lot of times it's better to just get the forms at the office.