To not pay for 17 yo's extra curricular activities?

[Ambleton]

DD is 17 and would like to start a sport and instrument. She turns 18 at the end of November.

WIBU to say that I won't fund it? What age do you stop paying for them if they have done them from a young age?

My eldest does a lot of expensive extra-curricular stuff. Assuming she wants to continue with it when she is 17 or so, I would keep paying for it as I would not want her to give it up because she coudn't afford it herself, and I would rather pay for valid activities rather than giving her money to squander on whatever nonsense she wanted. Not so sure about a new hobby though. I still think it's to be encouraged unless she has a history of taking up stuff and giving up on it again in which case I would get her to at least contribute herself to see just how keen on/committed to the idea she is. Also, if you have to hassle her to practice then stop. I would pay if she clearly loves it and voluntarily spends time on it.

My parents paid for my extra-curricular classes til I left school at 18. Not sure if they would have continued to pay if I'd wanted to continue after that (I didn't or did free versions of it at uni), though I think they probably would have done for my brother, but then music is his actual career now so it's a bit different.