Is there a way to have a field created on a form based on completion of another field or use of a button

On this forum I can try to answer specific questions.  Or else I offer one-on one consulting services  and I can be reached via the contact information on my website QuickBaseCoach.com

I'm not sure if you have a specific question at this time.  The question seems to have evolved morphed from how to create new fields on the fly to an outline of the broad goals of your app.