It depends on the student or the person who wishes to learn full-stack development. You can learn it by watching YouTube videos then it’s free for you. But it will be very cumbersome since you need to learn various tools and it will require a lot of effort to locate each tool and learn them separately.
If you can learn by videos and through online mode, as most of us now will prefer then and you need support in between then you can take paid courses from Udemy, LinkedIn, Coursera, etc which comes in 500-2000 rupees.
And if you cannot learn by video lectures and you need a Bootcamp you should join one and now since most of the physical classes are open you can learn full-stack development course offline which again cost you around between 20,000 – 50,000 rupees.
So it all depends on you.