DEEP BREATH! You are doing a fantastic job keeping your little girl happy and healthy. Yes, larger would be ideal. BUT you made the NECESSARY changes immediately, the ones that will quickly affect her health.
Yes, they are fragile animals, but you are taking such good care of her and doing all you can for her. Before I got my guy he was only kept in the small cage, no supplements at all, incorrect lighting and only fed meal worms. He was year and a half when I got him and had MBD. He just turned two and is a happy healthy and grumpy little guy. The only lasting damage he has is a crooked casque. If my guy can survive that, your girl will be just fine in a smaller cage till you can afford to upgrade.
Personally, I only come here, select YouTube channels, and chameleon academy for advice. Everyone thinks they know best and that their way is set in stone. I think there is some leeway here and there. Not every routine/regimen will work for everyone. And I have found that even if I am doing something totally wrong, people here will kindly correct you and actually help you get it right rather than judge and scold you.
Keep up the wonderful work with your sweet girl!