Static, you have obviously not witnessed the other building contests that has been built on PMC.
Take circlelight's build for example.
http://www.planetminecraft.com/project/lunar-awakening-adventure-map-contest-entry/
Created in 4 weeks ...
Or Abycia's, also created in 4 weeks.
http://www.planetminecraft.com/project/gargoyla---evil-yet-heavenly-caved-in-entry/
Anyway, my point is, the skill put in into the building doesnt have a settime, As long as you're dedicated, and took a few hours or so to look at and plan what you're building.
Also, themes have also been put into these maps, and themes dont take so long to figure out a good one.