My first and only parrot is George. I'm 34 now. I got him when I was 25 and he cost me $600 (Canadian $) + about $200 for the cage and another $150 for the first bags of food, perches, toys, bowls, etc. Don't forget the cost of veterinary visits and medication when your bird is sick.
More than the money, which you may very well have, is the fact that young people dont have stable lives. You likely still live with Mom and Dad. What happens when you move out? Will you be living elsewhere for college? You probably cant bring your parrot. What happens if you move to a building that doesnt accept pets, or have a significant other one day that your bird despises, etc.
While it is POSSIBLE for a minor to be a successful bird parent long term, it's not very likely. Your parents should be 100% onboard and willing to take over caring for your little guy should you need them to while you are at college etc later in life, and your entire family should be aware of the extremely high level of attention and care (and cleaning) that having a parrot involves.
The general consensus on this forum based on another teenager's thread where he talks about wanting a cuckatoo, is that, getting a parrot before you're in your 20s and have a stable life and some things figured out probably isnt the best idea.