If you're obtaining a 30 day extension, then if you entered with Visa Exempt you use IT Square Laksi, if with Tourist Visa or other Visa you use Cheangwattana
the definition of work is incredibly broad. I'd say lack of law enforcement and/or legal cases (that I know of) against remote workers would make it a grey area.
no, you're choosing to ignore parts of 4. When you apply under 4. It has requirements to hold funds. If you don't plan on getting an extension next year that requirement doesn't disappear. It's the requirements of obtaining a visa extension under 4.
I still don't know how you interpret the 400k for 7 months only apply if your applying for for an extension the following year. As it doesn't say that anywhere.
I really don't think you get my point. You can apply using 3. OR 4.
My point is if you applied using 4. The requirements are for you to maintain a certain level of funds in your account. That's the written requirement. It doesn't say you can apply using 800K, then use 65k income instead. The OR isn't placed midway through 4.