I am going to replace a small decrepit metal tool shed and want to maximize it for a few garden tools and for a growing inventory of preparedness items.

[*]located in a climate with four seasons, high of 35 C, low of 0 C
Do you get Tornados in your area? There is a reason I ask....

[*]needs to be well-secured - I'd like vents to help with temperature extremes but maybe just a door otherwise to reduce points of entry. (love the idea of skylights, solar panels, barred windows Solar Tubes
[*]I'm currently saving for this project but haven't fixed a budget yet.
[/list]
With no basement, garage or attic, I have very little indoor storage, which I am using mainly for additional food storage and items that need the moderate temperature/humidity environment of my home. The shed is going to be a real boon to my organization and improving my being "equipped to survive."

Thanks for any ideas or tips you can share.