Double exposure images for marketing

My client wants to create a series of images using an in-house developed style, for use across their marketing materials. The process is pretty established, being double-exposing a combination of images to give one overall look.
We want to get a series (initially 10-15) of these images to test with some consumers.
Please review the shortened-brief attached, and get in touch with an example of your work if this is of interest.
We will have a brief discussion, and then award the images to the designers who provide the best fit.
Budget below is per image.