Nikita needs your help a.s.a.p

I have had Nikita since the age of 8weeks,she is now 6years old, She is so gentle,LOVES the elderly & LOVES all children,I have 2 brain tumors also had a stroke & serious car accident,in which i am waiting for hip/knee replacements,Also i am waiting for a heart valve replacement,After my stroke,i couldn't function,Nikita is my companion/service dog & only because of her,i am still here, She gives me a reason for getting out of bed, I live alone & struggle to make ends meet, I just found out from the vet,Nikita needs 3 knee replacements at $3500 each,she is in so much pain,on alot of medications,1 knee she just had tore her ligaments & that knee needs replacing asap,I am begging anyone out there to help Nikita,When i am in pain,because of all my numerous injuries from the car accident,Nikita knows & tries & help me get up of the couch,as i am on crutches, I can not bear the thought of having to put Nikita down & for her not to be in my life,The vet said,with all 3 knee replacements,Nikita would have a normal healthy life & at least another 7 years to live, Please Please can someone find it in their heart to help Nikita, I could not go on in life without her help,