Traveling to Thailand on US passport. Planning to get an METV. I will be in Thailand around 95 to 105 days - maybe a bit more.. I understand the METV when I arrive is initially good for 60 days - I could then get a 30 day extension. Question 1) Is that correct? Question 2): Could I also get a second extension to cover the end of my stay? I understand another option is to leave Thailand and return which would then start a new 60 stay. If I go to the Myanmar border at Mae Sai I believe I can leave Thailand briefly (hours) and then return to Thailand to get the new 60 day. Question 3) Is that correct? Final question 4) - do I need to get a separate Myanmar visa to enter at Mae Sai or do they have some type of "on arrival" visa - realize this is not specifically a Thai visa question but I've seen many posts referencing doing the Mae Sai trip but couldn't find details on the entry to Myanmar. My thanks in advance.
TLDR : Answer Summary
The METV provides an initial 60-day stay upon arrival in Thailand, which can be extended for an additional 30 days at immigration for a fee of 1,900 baht. While you cannot obtain a second extension for the same entry, you can conduct a border run to countries like Myanmar to get a new 60-day entry stamp and then apply for an extension afterward, potentially increasing your stay significantly. For the border run through Mae Sai to Myanmar, you typically need only a day pass and do not require a full visa to enter Myanmar.