Well, I don't know what level of difficulty you want to do, but for a "simple" option to feed 180, I'd do 3, 11x15x4, sheet cakes. I'd put this image on 2 of them [one image reversed and perhaps feminized] and the logo on the 3rd cake. For display, I'd place the 2 image cakes on either side of the logo cake. In my mind, this leaves the option for multiple flavors, easier cutting, easier transport, etc.
Thank you so much this really helps! :)