Bladder Stone Surgery for Tervis

Tervis is more than a pet to us, he is our son! He started urinating blood Monday evening, after taking him to the vet Tuesday we found out he has a calcium oxalate bladder stone along with cystine crystals in his urine. His stone is very large and needs to be removed asap so it does not block his bladder which could be fatal. While he is under they are going to neuter him, due to the cystine crystals. This will prevent further stones from forming.
After talking to the vet today, they are quoting us around $3300. We have booked his surgery for tomorrow as his condition has gotten worse throughout the day. This is our last resort and any amount will help.
Thank you!
Love Tervis, Candace, & Kurt