Dog rehabilitation

So to start with many people will say she’s “Just a dog” but to me she is my family, it’s only me and her…I purchased a German Shepherd a couple of years ago from TradeMe. I asked the people had she been socialised etc and they said yes! So due to me being sick at the time i said i will come get her and check her out the following week, they said to me that heaps of people wanted her and that i would have to pay for her if i wanted her...so i did! Anyway i went and got her the following week and she was very scared of her owners. Once home she used to cower and pee, was absolutely terrified of everything, she had never been socialised, played with, groomed nothing. Then last year she got sick and it was all due to stress..long story short. I couldnt take her anywhere for 5 months while she was sick and is now highly aggresive and reactive. I have a place i can take her for rehabilitation but i need help to get $3200 to do so which includes my travel to get her there and back. She will be going for 30 days to Freedom and Harmony dog rehab. If you can help it would be very very much appreciated. She needs help and so do i as i love my girl. Please please help 🐕🐾😞