Camping out in my tiny house shell

How little do you need to "camp-out" in your tiny house?

I'm planning on spending some nights in my tiny house before it's actually completed. What do you think I need to have in there to make it livable?

I'm thinking about these things:

• Walls/Roof
• In my case, SIPs, but I think for stick building you'd need insulation in there.
• Without these it's hard to call it a "house".
• You should at least have Tyvek and ice and water shield to protect your house.
• Windows
• You could probably get by without these in if you don't cut the sheathing out.
• Increases visibility of the perimeter in case of zombies but then again, zombies can break windows so it's a wash.
• Door
• To keep out the bears, coyotes, hobos, and hobo zombies.
• Heat
• If it's cold outside, if it's hot I think air conditioning is optional.
• Could be temporary space heater.
• Plumbing
• I have a composting toilet so that's easy to put in without full plumbing.
• Drinking water, no need to have full plumbing at this point.
• Shower somewhere else: Gym, Friend's house, local historic fountain, or sponge baths!
• Electric?
• I doubt you "need" electric but a simple extension cord would run your heat and laptop.
• Battery powered camping stuff would help out here.

What do you think I missed? Anything you think you need before camping out or anything you think you could do without?