Before asking for "how do I figure out what to do?" (spec) you should define what's up (problem) and determine how to handle it (solution) and then come up with the specification.
"Trench CAT6"???? No, you are unclear on the concept of a)trench b)concuit, and c)CAT-6. Before you ask me why I'm dissing your plan see above about Problem/Solution/Spec. In short, copper bad, fiber-optics provide opto-isolation, CAT-6 won't get you anything CAT-5 won't since you stupidly rely on *one* commodity ISP, and you have nothing to trench for. Short answer: inner-duct with multi-mode fiber will carry 1G, 10G with no electrical connection nor ground issues.
UPS? No. LOL. That's good for your kitchen. If you want solid power get a -48VDC battery pack, a rectifier/charger, and an inverter for AC operations.
Whiteboard walls? How is "what I do with my walls" part of any IT strategy? Do whatever you want with your walls. You want IT advice? See above. You want interior decorations advice, see an interior decorator.
Your concepts of physical security (double up the wall beams and which lock should I supply) are absurd.
Let us know when you have your fortress done.
I'd like the opportunity to drive my car through your front door in 15 seconds and see how great your $3.75 works.
I did try to be helpful... but as other posters have pointed out... SERIOUSLY???