Enhance & Extend Family Photo

I have one high-resolution family portrait that needs a subtle yet polished Photoshop touch. The frame feels a bit cramped, so the priority is to extend the background— wider—while keeping the setting believable and consistent with the original scene... (Budget: €8 - €30 EUR, Jobs: Adobe Photoshop, Digital Art, Graphic Design, Image Processing, Photo Editing, Photo Retouching, Photography, Photoshop, Photoshop Design, Visual Design)