And what languages would those be?
Try to keep them fresh with YouTube videos of something that interests you (in the target language).
I can speak ENG, SPA, POR, and ITA 😊
In the past I've studied CHI and JAP, but I remember so little and they are so difficult that I doubt I even have a A1 level 😐
Nobody is stopping you from staying more time!
With that amount of money, you can do what you want.
This is the world we live in.
Caring for "all your friends" would be very dangerous. They'll want more and more, and friends that you don't consider friends anymore, will become friends again, all of the sudden.
Syncthing full allocation also offers conflict resolution 🤷♂️🤔