Green Screen Background Swap

I have three photos that were shot against a green screen. Your task is to deep-etch each subject cleanly, eliminate the slight green spill that crept onto skin and clothing, and place the cut-outs onto three different sample backdrops... (Budget: $50 - $60 AUD, Jobs: Adobe Photoshop, Background Removal, Color Grading, Image Processing, Photo Editing, Photoshop, Photoshop Design, Visual Effects)