they could sedate him, clean the wound, and administer antibiotics for just over $2000
OP I don't know how long it will take you to get the money but please clean the wounds as best you can yourself in the meantime.
I remember someone in your other post said it's probably dog bite abscess. I have cleaned those before. You will need warm water, put a little betadine iodine in it and use soaked cotton wool to very gently "lick" the wound as if you are another cat.
Wrapp the cat's body securely in a towel first.
I would phone another vet and ask for a quote as what you have been quoted sounds insane to me especially since they didn't even tell you what the wounds are.