The last suggestion would be to start in Bangkok, which is an amazing city even if you avoid the Khosan Road party area, and then head south along the coast and into Malaysia and finally Singapore if you feel like it. There are many nice beaches and islands in Thailand that aren’t filled with party folks, and some really interesting places in Malaysia as well. George Town on Penang is really nice with excellent food, and Kuala Lumpur is my favorite city in Asia for few reasons. The town of Malacca is really nice, and Singapore is amazing, if a bit expensive.
You’ve got a pretty good budget so you can afford to go almost anywhere, assuming you are okay with renting one or two houses or villas instead of 4 hotel rooms. If you are willing to fly all the way to Asia, your best bets would be Bali or one of the Thai islands, probably Ko Samui or Phuket. In all of those places you should be able to rent a house or villa near the beach and then do activities and day trips very easily.
Pretty much everywhere is going to be at or near capacity for those dates because half the world is on Christmas break. Between Australia and New Zealand, I think New Zealand would be far more interesting for 10 to 14 days. In Australia you pretty much have to spend a few days in Sydney, a few days in Melbourne, and a few days at the Great Barrier Reef, all of which require flights and will be very crowded over those weeks.
Of the others, I’d say that Thailand would probably be your better choice. Goa is obviously famous for its beach parties, and drugs are easily available there just in case that is important, but there really isn’t much else to see or do there. Goa is a collection of beach towns, some of which are filled with raucous Westerners all winter. But once you go inland, it’s kind of falling apart, and it’s not even very “Indian” because it was run by the Portuguese until about 60 years ago.
All in all, it was so easy to stay on track. I think making my mind up beforehand helped, and I didn’t make a big deal out of it. No one else in my family felt deprived, and our trip didn’t revolve around what I could or could not eat. I did decide to have a cheat day on our last day of vacation, and I’m okay with that. One day for me is much more manageable than eight. Afterward, I will jump right back on track. If you decide to follow a keto/low carb eating plan on vacation, know that you are capable and that it doesn’t have to be hard. I think so many make it harder than it is with so many extra rules that it is easier to give up. Do whatever is simple to you. If researching restaurants and making a plan ahead of time fits better in your personality, do it. If you are a bit ADD, like me, and planning causes stress then follow my off the hip craziness. Taking steps to simplify the process and not being too hard on yourself will be crucial to success. If you eat two of your kid’s french fries at dinner, don’t beat yourself up! At least you didn’t eat all of them. On the other hand, if you ate all of them, push the reset button and start over the next day. I followed the steps above, and then I gave myself grace. I’m happy to say that I am came home feeling great, I am enjoyed my one day off plan, and now I’m right back on track!
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.
Blisteringly hot in summer, Tokyo is a breeze in the cooler months. Fight the dizzying jet lag and head out for the world's best sushi or ramen, shop in the city's amazing department stores, and visit the parks surrounding the Imperial Palace in the center of the city. Escape the crowds somewhat by heading to Yanaka Ginza, which retains a bit of old Tokyo and has plenty of places to eat and shop. Do make time for a side trip to Hakone, where you can visit a Shinto shrine and see magnificent Mount Fuji on a clear day.
Since flights to Mexico City from the US and Canada are usually quite cheap this time of year as well, this could be a perfect short cultural holiday. This city has great shopping, dining, and nightlife, and the central historic and tourist districts are far safer than most people would expect. There are ruins just out of town as well, so a bit of everything is available.