Streamline Auto Pay Sign up with Registration

When a student registers for class, I would love auto pay be a check box, after then enter in their credit card number vs. a whole separate module they have to complete before registering. It would be even better if you can make the check box mandatory. This would significantly streamline the registration process. Right now I have about 10 students per week who get stuck in registration because they don't see the small prompt at the top of the screen telling them they need to sign up for auto pay. Thanks for considering this idea!!