One week is a short time to craft the display. I hope that week was only about "scripting" and not the whole creative process, which shall be longer than that, I suppose, to design an excellent show.
One can think about a project for a long time, but then sit down for an uninterrupted week and get it all done, at least, the design. I'm sure there's work after that to do the implementation (labeling, packing the show etc.) that's not included. Don't forget that some composers would sit down and write out and entire symphony in one session!
I know of at least one Gold Jupiter winner who took a similar amount of time ... but I won't say who
Paul.