Please help my dog Zorro

A tragic misunderstanding led to Zorro and my sister's male intact 100+ lbs Akita to get to each other in my backyard and cause the worst dog fight I've witnessed to take place. The dogs were going at each other for nearly 15minutes. This is beyond tragic as my sister has just moved here from Canada a couple days ago and is staying at the house with her dog until she settles to a new life. We were keeping the dogs completely separate until I misread my sisters message about Switching up the dogs and their whereabouts. Unfortunately I got in the middle of the fight and was bitten unintentionally very badly. My hands torn where my pinky is and I needed to be rushed by ambulance to the emergency to be stitched up and cleaned up. When I returned from the hospital I noticed Zorro isn't too well and has several deep punctures to the neck chest and front right leg. I took him to the emergency vet and the doctor said he needs surgery, and has to have drains put in as well as be stitched up drugged up and on antibiotics. The estimated vet bill was 2600+ US dollars and I tore myself up because I can't afford it. They did the minimum cleaned him up gave him some injections and pain meds and sent us home saying we must get him to our own vet today to have procedures done on those deep wounds and put him on meds. The worst part is he also has to be quarantined and I'm just losing my mind. Those of you who know me know what this dog means to me and how much I love him. Please help us get Zorro back up and running to the happy playful puppy he is.
I've never used this type of help before, I am not working the last couple years due to surgeries I needed myself. Thank you everyone for your help and support. God bless.