Photoshop Pants & Cleanup

I have a single photo that needs two equally important edits. First, the man in the shot is wearing short pants; please extend them into long, straight-cut trousers that match the current shorts in colour, fabric texture, stitching and lighting so the change looks seamless... (Budget: $10 - $30 USD, Jobs: Adobe Photoshop, Background Removal, Graphic Design, Image Processing, Photo Editing, Photoshop, Photoshop Design, Visual Design)