Consider METV. You might have to make a trip to your home country for that as I don't think you can get that at a neighbouring country unless you are resident there.
you'll have to ask the immigration officer. I have no idea. Maybe they've come across some scams (air BnB landlords) or maybe they're on the take, although corruption in Thai immigration is extremely rare.
think you're talking about the Andaman club. I find think it's possible to go there now. Something to do with wars and stuff. Not 100% . Last overseas place I went to. I don't think you need to pay for a visa there as I still have a crisp $10 us note somewhere but you do need it if you go elsewhere in Myanmar. And you need to stamp out stamp in stamp out stamp in