Here are the two biggest techniques I use to save money whenever I go on super-long trips abroad (1-4 weeks).
1. Make sure your room has a small refrigerator, and buy as much food at the grocery store as possible.
One of the reasons so many people get murdered in their travel expenses is because they eat all three meals at restaurants. If you’re going away for a fun weekend vacation, that might be fine. But if you’re living abroad part time, that’s not going to work.
I always make sure that wherever I’m staying, regardless of it’s a hotel or an Airbnb apartment, has at least a small refrigerator. This is mandatory or I don’t stay there.