You need to check their website.

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@Mart ****

, yes, all applicants have to pay each. It totally depends on the Thai Embassy/consulate if they require you to prove 500K for each or 500K baht equivalent of the primary applicant can cover all family members. Yes, both have to do 90-day reports if staying in Thailand long enough.

She can work only remotely for the company or clients outside Thailand, not for anyone inside Thailand.

The advantage depends on individuals' priority. Someone's pros could be someone else's cons. That is solely your decision.

Every single applicant has to pay the fee, no matter what type of visa, primary or dependent (except nationalities that are waived visa fees).

If you are staying longer than 90 days from the day of arrival, you need to do a 90-day report to the local immigration office, every "90 days".

@Marc *********

, check the detailed requirements or what documents are acceptable vary by RTE/RTCG. Check their their website first.

@Ručman **********

, depends on the office. Some require you to cancel work permit first.

@John *********

, that’s why I mentioned work permit in that answer

@Daryl ******

, you can if you provide all necessary documents. Check TM30 system user’s guide for details.

@Rune ******

, count 90 days from your entry date.

For example, I do my TM30 every time I stay out of my apartment, regardless of staying at hotels, guest houses, or a friend's.

In most cases, my TM30 has a much newer date than my entry date.

Don't worry, just submit a new one.

The check-in date on TM30 does NOT have to be the same as your entry stamp. TM30 is supposed to be submitted within 24 hours after you arrive at that address, not the day you entered Thailand.