High-Res Photo Mosaic Transformation

Transform the 3 photos into a mosaic, with high resolution and without changing the original design in any way. digital display I need three source photos merged into one seamless mosaic that will be shown on a digital display... (Budget: $250 - $750 USD, Jobs: Affinity Photo, Digital Art, GIMP, Graphic Design, Image Processing, Pattern Design, Photo Editing, Photoshop, Photoshop Design, Visual Design)