I don't have your answer- but I thought I would share my cheap catio:

https://www.amazon.com/GUTINNEEN-Outdoor-Enclosure-Wheels-Resting/dp/B08HH5PBG4

and scroll down to the "bought together" part.

Basically I have a cat door in the window leading to this enclosure. It sits on my deck.

I close it down every night, when I'm not home, during a bad storm, or when it's cold.

She loves it - in it 4-5 times a day.

Just thought I would share in case you find this easier.

Good Luck!

(BTW it's lasted 3 years in the North East and still doing well.)