Good on you!
Jenny took the words right out of my mouth
But also, you'll have to remember to keep the cage very
clean. You may have to clean it even twice a day, so that its hygienic for her if she likes the bottom of the cage.
Find perches with lots of grip (natural perches) so that if she wants to perch, she can be able to stand without falling.
I'm not sure if budgies like them, but what about a snuggle hut or something along those lines for her to sleep and sit in? http://www.petdiscounters.com/mc_ima..._hut_small.jpg
Have horizontal bars for her cage, so that she can climb easier, and maybe ladders.
Keep her food and water/water bottle on the ground if she prefers that.
Other than that, I can't really think of much else.
Once you observe her you will be able to see what she needs to enhance her life, and her deformity may not be as bad as you think!
I hope you can get her!