You can put together a media server and build a catalogue so you can watch movies and series offline. Maybe not a huge priority in that situation but definitely nice to have.
Jellyfin is a good option for streaming from a media server to other devices. The *arr suite is an option for building the catalogue.
Navigation on Android: Osmand lets you download and cache OSM data so you can use it offline. Cache is unlimited if you download Osmand via F-Droid.