Register the kids birth with the local thai embassy for where they were born and they won't need a visa (a little more complicated than ive put it). As for you non-o marriage.

Your wife having an ED visa won't cause her any problems in the future as she is a Thai Citizen, you on the other hand will likely have issues as its a widely abused visa so I would avoid it at all costs if you can.

The kids don't need a visa as their is no fine nor punishment for children overstaying so while you register them as thai citizens you won't have to worry about their visa status, but if you are strictly wanting to get them a visa then, yes they can be put down as dependants on a ED visa (not sure about short-term ED visas though (as in non-university courses such as language)

@Melanie ***************

they are right. There is no such rule and its about the amount of time you spend here not how many times you enter.

Fred Naancome Wijnands it's actually dependent on what your local immigration wants. Some do want you to file a new TM.30 every single time regardless of whats in the system, whereas others are happy just to accept the original (if its still showing in the system)

GrayRambutan8107 vip and fast track aren't the same. VIP is through an agent who gives tea money to a high ranking IO at the airport to ensure a smooth process.

TaupeYuzu9177 thats about the normal price too

John Hampton its not pre-approval. It isn't an ETA system its just a notification of your intent to visit & is not checked by an IO or system prior to your arrival.

Ryan Sze well damn, guess I just got lucky and got it done just before this started being enforced or had IOs that didn't know/care.

Ryan Sze thars always been the case.

Ryan Sze yes I know how it works ive been doing it for nearly a decade. As I said i didn't have any issues last month.

Is your income from work in Thailand or is it remitted to Thailand from abroad & are you married to a Thai? (Just trying to figure out what the difference is/if there is any difference)

Ryan Sze since when? Renewed my extension last month at CW and used income from work in Thailand method without issue.