Thank you for all the help, and sorry for coming back to you all so late. 😅
I have switched to pine (for now, as i threw out my super dirty/used fleece and have nothing else), and ill soon switch again to paper or cardboard. I'm getting a custom cage built for her, metal with glass and screen sides and screen top, metal frame. (I have the heating and ventilation all figured out.) Its going to be 28 x 24. Thanks again for all the advice!