Design poster-type wall art -- photo collage

Please see my website for my professional background, davidgalliganconsulting.com. I am an exacting art world professional who has executed a couple of photo montage projects myself with partners such as you. I am used to these partnerships. Images of these projects are attached. This one is much simpler, a composition on a grid approx 2' x 3' using just a few color photos I took on my iPhone 12 Pro in Mexico -- perhaps 3 central images, perhaps all the same, one in the center the negative of the other two -- with a border on all sides of much smaller images. For an experienced professional this will not take a lot of time. Output required is a JPG or TIFF capable of being printed to the 2' by 3' scale without significant degradation of the central images. The image of the agave farm attached is the central image, perhaps repeated 3 times.