You know how much I paid for college? $0.
You know why I paid that? Because in high school I did a lot less than what you outlined above, but it was enough to get a scholarship to go to college. Six great schools looked at my application and offered me somewhere between a discounted rate and a full ride + stipend on top of that. And I was only 20th in my high school class by GPA rank.
If you think that you can match a college degree based solely on self-guided learning, then you should be smart enough to get a scholarship. It's the same damn process. You need the self discipline to stick with a program of learning and working, and you need the intelligence to learn without support. It's just a question of whether you realize that in high school or later in life.