Nature Scenery Background Replacement

I have a set of photos that require precise background removal—no colour correction or retouching, just clean extractions. After the subjects are isolated, I want each image placed onto a cohesive nature scenery backdrop rather than a transparent or solid-colour canvas. The replacement scene should feel realistic, matching lighting, perspective and depth so the final result looks like it was shot on location.

Please keep edge work flawless (no halos or leftover pixels) and preserve the original colours of the subjects. Photoshop, advanced masking, and non-destructive layer techniques are expected so I can tweak files later if needed.

Deliverables
• Backgrounds removed and replaced with high-resolution nature scenery
• Layered PSD files plus flattened JPG/PNG at original resolution
• Consistent file naming that mirrors my source images

A fast yet careful turnaround would be appreciated—let me know how many images you can handle and your estimated timeframe.