Summer cage?

[Nicky]

I live in Ontario and as you who know who live here know in the summer it can get HOT!!! so I was thining why not build a summer cage? but then I thought well...
1)theres bugs and mites what happens if they attacked my snae?
2)it gets smoggy in the summer what happens if she ghets a dieses?
3)what happens if I build it wrong and she escapes?
4) what happens if someones cat gets into our backyard and kills her?
5) the next door neighbors have rats, rats are smart what happend if thye see my little cornsnake as a meal?
6)should I make a cage? how
7)should I just buy a cage?

I'm confused and I don't know what to do any advice?
thanks and how does one build a cage?