Waiting for 2026 won't make any difference but you seem like a genuine tourist so should be OK, but as ever it will be up to the immigration officer you stand in front of

You need 500k baht for the application leaving around 400k baht savings. Nowhere near enough for the 5 years duration of the visa. Really they want to see ongoing income when they ask that question

@Maxim **********

you are not coming from Cambodia by land. The land border between Cambodia and Thailand is completely closed

@Michał **********

that's not what I asked. I can't help if you don't answer questions

If you have a residency permit you can apply in Qatar otherwise you will have to travel back to the country of your nationality if you really want the Non-OA visa. Otherwise you need to travel anywhere that will allow you to apply for a Non-O visa. Many won't issue a Non-O dependant visa for your wife at the same time as you apply for a Non-O based on being over 50 so she may need to apply for her own Non-O based on being over 50. She can't get a Non-O dependant visa inside Thailand nor any nearby country

Were you on an ED visa or extension of stay? If the latter have you cancelled it? And did you attend all the classes required by the school you attended?

@Michael *******

on what grounds would you apply for a Non-O visa?

@Maxim **********

I believe the price varies depending on the difficulty of the case ie the number of stamps in the passport etc so they look through the passport and then give a price. He can't a Non-O based on a Thai child until he has legal rights which can take many months

I suspect you are not on a visa at all but rather you are on an extension of stay, take a look in your passport and check. If you are on an extension of stay it is not void because you travelled out of Thailand, you need to get paperwork from the school you studied at and go and cancel it at the relevant immigration office in Thailand. It shouldn't stop you entering but can be a real issue going forward

If you mean extension then yes you can