Do I just need to play or do I have to work as hard as I possibly can to get better all the time like an actual pro?
If I've just got to play and do however much studying and practicing I want (and I would do some) I'd do it for expenses plus maybe 30K.
If I have to actually work as hard as a pro, I'd call that a pretty high-intensity job. I'd need a lot more.

I'd take $50k per year after my expenses were paid ideally, but would try to make it on less...
...I'd never work another day in my life!