Seamless Family Photo Merge

I have three separate shots of my family, each capturing different people, and I need them merged so it feels like a single, naturally-taken photograph. The goal is a flawless composite—no obvious joins,... (Budget: £20 - £250 GBP, Jobs: Digital Art, Graphic Design, Image Consultation, Image Processing, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)