Help me bring my cat home

My cat Loki has a history of urinary issues, and this last bout has been the worst. After 5 days and counting of vet stays, exams, and catheters, he is finally going to have surgery to help prevent these issues. Unfortunately this comes at a high cost. 
I have already paid roughly $4,000 for his stays so far, and we're not done yet. I don't have enough saved to pay for the surgery and additional time with the vet.
Anyone who has ever met me knows that Loki is the light of my life and that I love him more than anything. Just being apart breaks my heart, and knowing he's in pain is destroying me. There are no words for how much I want my baby home and in good health again. I've joked before that I would go bankrupt for him, and I suppose it's time to put my money where my mouth is. 
If I meet my goal and can pay for his medical bills without actually going bankrupt, I will happily share the excess with other pets in need. I don't want to be selfish and take advantage of the generosity and kind hearts who help me, but rather pay it forward.