Hello, it depends a lot on your usage habits, so it's hard to say, because for each person the amount of data can be very different. Packages can also differ from one country to another and there can be surprises. I've bought packages with a lot of data on the surface, but with limited area or services allowed.

What I can advise you to do if you are using a mobile hotspot is to disable the background sync services (e.g. photos) in your phone as they will use your mobile data unnecessarily. Wait until you are on a fixed wifi (hotel or other) to reactivate them. Also be careful with data-intensive applications and services (video, etc.).

For your information, Huawei hotspots have a mobile application that can show you in real time your consumption. Enjoy your trip!