I'm being treated at Bangkok hospital and I did ask. They said you need to speak to immigration specialist as they only provide the medical cert and can't answer the questions 2-3 I outlined above. I'm not against cost, as travel insurance is covering it but again I've got no idea who is reputable on such a niche scenario
thanks for quick reply. I have the cert from the hospital for the extension,but they have no idea about questions 1-3 as it's not there field of expertise