knee surgery for sadie

i take care of my grandpa who after 5 massive strokes, no longer has the ability to walk. he was in his chair and sadie, my cavalier king charles spaniel puppy was in his lap when he rolled off of the side of his chair and managed to land directly on top of her right leg. because of this, she now has a medial patellar luxation meaning that her ligament on her right knee is snapped and her knee cap is no longer in the knee joint. i never thought i'd have to ask for a donation; however, there is absolutely no way we can afford this 2100.00 surgery that she desperately needs. we are desperate and need help. we will be forever grateful.