series of line drawn sketches to illustrate an educational project

I have just undertaken a research project where participants were asked to quickly sketch or visually describe some key concepts about their own career trajectory. I have a mix of the messy sketches and some visual description and would now like to translate these to a consistent but simple look. For instance, once participant talked about feeling like a swimmer in a strong current and I'm imaging an image of head and shoulders of a person swimming through choppy water. Another describes 'falling into' a career, and I imagine an image of a small figure falling backwards over a ledge or a cliff. Another describes being lost in the books...you get the drift! I'm envisaging small black and white line drawings that will run along the bottom or down the side of the explanatory text - they can be a bit rougher rather than polished or computer generated images, but with a stylish flourish. Additionally, I also asked participants to draw onto a diagram - again, I have copies of some participant responses but would like these more creatively rendered onto the diagram. All images will be printed in small scale, black and white, approximately 2inches x 2 inches. I would like high resolution versions of the drawings sent to me multiple formats, to allow for easy handling. Please note that I would like copyright of the images given to me (with acknowledgement of you as the contributing artist if ever published). I'll pay £6 per drawing/diagram rendering, and am anticipating 15-20 images altogether. I will pay per drawing (or batches of drawings, your choice). Please allow for some editorial comment and revision early in the process as we work out an agreed approach. The production of the images can take a few weeks, with clear communication throughout, but must all be completed towards the end of July. Thanks, I look forward to your responses!