Thanks for the kind words and I’m happy to hear that this info helps. The Mount Rinjani ash cloud situation is also a mystery to me at this point. My plan was to fly into Bali more or less for the full month of February, but according to the news it does seem possible that the skies in the area will still be unsafe at that point. I will already be in Asia and if the Bali airport is still closed I’ll just go to the Philippines or Malaysia. But I wouldn’t book a long-haul flight into Bali for the coming months at this point, at least not unless I knew I could change it cheaply if the flights are canceled.
Southeast Asia is easier to deal with, and there are cheap flights connecting in the Middle East and landing in Bangkok, Kuala Lumpur, and Singapore. Each of those is a very interesting city, and there are many smaller places to go in the same region. In Malaysia there is Penang and Melaka. In Thailand there is Chiang Mai and quite a few others in that area. In Laos you can visit Luang Prabang, which sounds like it could be a winner for you. And there is also Siem Reap, which is home to the amazing Angkor Wat temple complex.
Vietnam is generally cheaper than Thailand, so if that is your primary factor, Vietnam could be the best choice. The beaches in Nha Trang are quite nice and the town is pretty easy for English-speaking tourists. But the other thing about Vietnam is that visitors have to be much more careful, especially when booking tours and that sort of thing. The travel agencies in Vietnam (even those in hotels, but mostly the independent ones) are famous for over promising and under delivering. That said, it’s a lovely country and you can have a wonderful time there on a modest budget. It’s just that you have to be more careful, compared to Thailand where the travel industry is a bit more honest about what you get and how much you’ll pay.
Overall this is a perfect time of year to visit almost anywhere in Argentina. When December arrives things really start filling up and all the locals are on their own holidays, so November is the ideal mix of great weather that isn't too steamy, and modest crowds and prices. With Argentina's recent inflation and currency devaluation, it can be hard to know how expensive this trip will be, but for most people it will be cheaper than in recent years.