Dot's Life in Peril: Your Help Needed

I'm David and I have a cat who's name is Dot and she ate some dental floss by accident. She will probably need surgery and aftercare which is very expensive to save her life. Please anything will help. I love her immensely and don't want to see her die this early in her life. She is essentially my child and she has a sister who's very attached to her so both of them are affected by this.