Where is the best place to apply to get a new METV in SE Asia with an American passport? I don't have to go back to the US for this, right?
TLDR : Answer Summary
To apply for a new Multiple Entry Tourist Visa (METV) with an American passport, you cannot do this in Southeast Asia. The only options are returning to the USA or applying at the Thai consulate in Perth, Australia, which does not have a residency requirement, as long as you meet the necessary financial criteria.