May be a stupid question but on a retirement visa can you put physical cash in your bank account.

I was told by a friend of a friend that he is staying in Thailand on a Non O visa that has been extended for a yea, that he acquired said visa inside the country... Is he BSing, is this possible? I always thought that to get a visa for Thailand, one had to go and get it at an embassy or consulate outside the country. Possibly a bribe? what's the story here.

So I saw a discussion on another group about cash on hand to be able to enter Thailand. I thought I knew the answer to this but a google search provided many contradicting answers so I ran here to where the facts live 😊

For a visa exemption is it 10000 thb or equivalent?

For a NON-O is it 20000 or equivalent?

Does anyone have a feel for which city, Bangkok or Pattaya, would be easier to open a bank account whilst in country on a visa exempt status? Which bank(s)? Thanks again.

What is needed to keep one's work permit valid if you change from a B Visa to an O Visa? Can you notify the MOL of the change and use the existing work permit or is a new work permit required?

800,000 THB for retirement extension - can it be kept as an equivalent sum of USD in a foreign currency account in a Thai bank?