The time to process and stitch that all together is going to be taxing. Figure about 1 1/2 days per 100 acres as a baseline.The client is hellbent on a final nadir (ortho) image but has no practical reason for doing so. The client will eventually down-size it to 1920x1080. They have no use for survey-related functions that come with the ortho. All they really want is to capture the entire area in one image for an online brochure with no zoom capability. IMHO, I think a nice oblique image is a more flattering look and shooting from a slight angle (about 20 degrees from perpendicular works best. As good as P4P cameras are, DSLR's still have the upper hand in color range and overall "brilliance".
I simply have to talk them out of the ortho.