Photo Enhancement with Seamless Elements

I have a set of photos that need creative compositing. Beyond any light touch-ups, the core task is to introduce new elements—text, graphics/icons, and even additional images—so that they blend perfectly with the originals. Nothing should look pasted on; every addition must feel native to the scene, with consistent lighting, shadows, and color tone.

Here’s what I need from you:
• Use non-destructive editing in Photoshop (or an equivalent tool) so I can request tweaks later without starting from scratch.
• Integrate the text, icons, and extra photos seamlessly—no visible edges, mismatched colors, or resolution drops.
• Deliver print-ready, high-resolution files (PSD layered + flattened JPEG/PNG) for each final image.

I’ll supply the base photos, the extra assets, and a short style reference once we start. Please confirm your estimated turnaround per photo and share a sample or link that shows you can blend additions naturally into existing images.