Fosse76 said: "I think the question is clear, though the expectations of the OP are quite naive. Should the book ever be adapted into a movie, then each individual song would need to be licensed from the rights-holder. And there is a difference in buying the rights and licensing the rights. I'm pretty sure the OP meant licensing. Licensing costs would vary, based purely at the discretion of a rights holder. It would make no sense to license an entire musical if you aren't adapting it as a film. You'd only be able to license individual songs.
Most of your song list is Disney material, and there's no way you would ever be able to license that music for a non-Disney-produced film. The other songs you might be able to license. For example, the recent film Love, Simon featured the musical Oliver! in its source material, but the filmmakers could not secure the rights to any of the songs, so they they ended up licensing songs from Cabaret."
There's a lot of correct info here.
You simply writing it into a script (published or otherwise) has nothing to do with permission. IF anyone wanted to produce this as a film, that's when permissions, licensing needs to happen.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.