Background Replacement with Gradient

I have a set of photos that need their current backgrounds removed and swapped for a clean, studio-style look. After the cut-out, I’d like each image placed on a custom background—specifically a solid colour or a simple gradient that complements the subject... (Budget: $15 - $25 USD, Jobs: Background Removal, Graphic Design, Image Consultation, Image Processing, Image Upscaling, Photo Editing, Photoshop, Photoshop Design)