Another option would be to become a volunteer and join an organisation that does volunteering work abroad. There are possibilities for them sponsoring your flights, accommodation, and meals.

That sounds super interesting. Do you have a link to that episode by any chance?

I’ve actually made the experience that, at least where I live, it’s mostly people in their 40s - 60s that talk on their phone on speaker or play candy crush on full volume in the bus. While teenagers and younger people are much more respectful, use headphones etc.