PDF Reformatting into Two Columns

I have a 2000-page digitally annotated PDF that needs to be reformatted into a two-column document. The content is already there; I just need it to be more compact. Requirements: - Change the font... (Budget: ₹1500 - ₹12500 INR, Jobs: Adobe Acrobat, Data Entry, Excel, Graphic Design, Typography, Visual Design, Word)