What would be the best experience to handle large number of questions in a form template creation UI?

I am working on a project where I have to design an UI for creating a template that has an text input area and also the user can add questions to the template. The questions added should be listed along so that user can view the text input and the added questions at the same time.

I am facing an issue regarding how to handle the questions in the same page. I thought of showing all the questions below the text input area in a collapsible accordion model. But I think this can cause UX difficulties when there are a large number of questions.

What would be the best way to approach this scenario?

Please go though the rough UI approach I tried.

^{download bmml source – Wireframes created with Balsamiq Mockups}