SoG,
You have very ambitious goals, but at this time any answer you receive is going to be pure speculation. By the time you finish college, complete flight school, serve your initial committment, and then take seven years to become ordained, you're looking at at least twenty years from now. Any procedures or regulations concerning this are bound to change in that time. I'm not sure where you are in the process, but if you're still in HS concentrate on getting into a school you'd like to attend and making the most of your time there. I'm sure if you are truly committed to being both a pilot and a chaplain you can make it happen (although not both at the same time,) but don't get hung up on what uniform you might be wearing in a few decades. Keep up your enthusiasm, but you need to take each step one at a time in order to reach your goals. Good luck.