Well, after looking into the cryoablation, turns out many of the costs were "hidden" and total comes out to nearly as much as surgery to remove the eye. I was quoted over $200 just for the initial office visit! I'm saddened that this is not something that I have the means to afford. I feel like I'm letting my poor baby down.
Butternut is still doing well despite everything, eating and basking as she normally does. However, I'm noticing some new bumps cropping up. My first vet did assure me that the chances of metastasis for her type of sarcoma is low and typically appears in the very late stages (which Ms. Nut is not in) which is hopeful. I'm going to continue calling around to see if any vet colleges would be willing to take her on as a patient for training purposes. Usually, they offer care at a discounted rate. I'll keep everyone posted.