Tweak Existing PDF Drawings

I have a set of drawings saved only as PDFs that need a light touch rather than a full redesign. The goal is to make minor adjustments—specifically resizing a few elements that are out of proportion and correcting several small errors that slipped through the first review... (Budget: $10 - $30 USD, Jobs: Adobe Acrobat, Adobe InDesign, Bluebeam, CAD/CAM, Graphic Design, Illustrator, Revit)