Natural Portrait Photo Enhancements

I have close to 100 portrait images that need a subtle, consistent polish. The goals are straightforward: correct the lighting, restore proper contrast, and add just enough sharpness so each shot looks crisp without crossing into an over-edited feel... (Budget: $10 - $30 USD, Jobs: Adobe Lightroom, Adobe Photoshop, Graphic Design, Image Processing, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)