Create a collage illustration for laser etching

I need a collage, comprised of various pictures of our pets along with images of my husband and me creatively arranged. This artwork will then be transformed into an etching, using laser technology. It is going to be at into a marble seat on a tombstone bench, so it will not be a color picture. It will be a sketch that will be laser engraved by the monument company. At this point I’m not even sure how big the etchings can be, we will coordinate with the cemetery and monument company. I believe we would need a diagonal high resolution picture. The illustration could be hand drawn, but it could be created by using various pictures I would submit. Please share similar work samples on your proposals. Attached are some concepts although ours would be very different guessing 3 Small dog, German shepherd, Parrott, Cat, st Francis and my husband (same sex) and myself. Creative