Kay,

I agree 100% with what Pam said.

Some ideas:
*I would put a roof on the enclosure/cage so kitty cannot jump out. I think you meant you would, but you were thinking of putting an actual ROOF. If you just wanted the cage to have a top, you can check these out:
Shade Panels

*This might help for cooling: Cooling Mat

I know you will always do the right thing when it comes to animals. You've shown us all that you love them with all your heart and would never, ever give them a life anything other than the best.