How much would physical therapy for ankle cost?

Depends: It depends on how long the therapy lasts and what modalities are used.Best to call the pt center.

Open the phone: Book, look under physical therapy, call them up and ask. Explain, you don't have insurance what your problem is and if an estimate could be given to you. You might want to consider "googling" various therapies and see if some you can perform on your own at home.