If you book a resort hotel from home you'll probably think Goa hotel prices are much higher than you were expecting, but if you book a family-run place once you arrive you'll still find fantastic bargains. It's probably wise to book a few nights online before you get to India, because it can be incredibly confusing at first. After that you might be able to find a similar place for half the price by just checking around the same area.
Costa Rica is kind of the Thailand of Latin America in that they have great tourist infrastructure and it’s the easiest place to get around. They also have a lot to offer with the beaches on both coasts and many natural sights and activities, plus of course the Arenal volcano, which is a really nice area. San Jose is best as a place to just pass through on your way somewhere else.
If you’re a bit more on the timid side, you can always use Yelp and TripAdvisor to get good insights on places people have visited. As a disclaimer, some of the ratings may not be accurate on these sites, so make sure you go through and read some of the more recent reviews that people have written. We did this for a few of the places we visited and had no issues.
Still, this is a perfect time of year to find bargains, as the full-on busy season doesn't begin until mid December. You might have to stay a few blocks off the main tourist strip if you are looking for something in a backpacker price range, but fortunately there are still plenty of very cheap restaurants and bars all over the city if you scan the menus carefully.
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.
If you are referring to days trips and that sort of thing, it will be much cheaper if you book once you get there. In Vietnam in particular it’s amazing how cheap tours can be if you book them through your hotel. I once did a 6-hour bus tour to Mỹ Sơn, which is near Hoi An, and I think I paid about US$6. It even included a boat ride and a basic lunch. That same day tour online would probably cost US$30 because the booking company takes a share and there is very little competition.
Seeing as our vacation was planned at the last minute, I didn’t have enough notice to be able to get the special meal treatment, so I had to make-do with what was readily available at the parks and the hotel resort. The following is a chronicle of how, with the help of their handy app and some careful surveying of the land, I managed to stay keto-compliant and, hopefully, will serve as inspiration for you to remain keto on vacation, too. After all, if I can do it at theme parks famous for burgers, fries, popcorn, ice cream, and breading everything, you can make it work just about anywhere.
Aside from Indonesia you might also consider Thailand, which has great infrastructure so it’s much easier to travel with young children. Phuket has by far the most options, and its rainy season usually ends in early November. For families I recommend Kata Beach and Karon Beach, which are both just south of the main shopping and nightlife town of Patong Beach.
You mention New Zealand and of course it’s summer there then, so it would be a good choice. However, all of these places will be crowded and near peak hotel rates if they are warm. So I’ll be happy to give you advice if you tell me if you’d rather visit one or more European cities in the cold season, or if you are looking for a warm place like New Zealand where it will be fairly crowded. By the way, the southern European cities such as Rome and Barcelona are lively and enjoyable that time of year, as the Christmas season goes on, and there aren’t too many tourists except for a few that travel to see their families around the holidays. So it can be a good time for southern Europe, as long as you don’t mind wearing a jacket or jumper during the day, and maybe a bit more in the evening. Give me a bit more guidance and I’ll be happy to try to help. -Roger