Help for my cat KISSY

So long story short: Kissy is a kitty saved from the streets when she just opened her eyes. I offered to foster her and take care of her until we could find a forever home for this little soul because i can't keep her because i already have enough cats. One day she could not walk straight and was falling down every secound. We went to the vet and we started treatment. We don't know exactly what she was.. it can be neuro or maybe from the internal ear.. Everyday we have to do the followings: 1pill of neurovet , antibiothic to the ears and clean them , 1 injection with GS ( 5 ml of GS is 35 euros ) and we also supliment her with Viyo Cat recuperation . She started to walk again but she still needs my support and i hope your support. Because i don't know how long it will take to get her back fully recover i would really need your help . If you can help i will be really thankfull.