Sorry you had to join our not so exclusive club.
Pail had
@Bronx's dad treated in New Jersey a couple years ago at Redbank. Places tend to offer 1, 3, or 5 day treatment options. Less days means less anesthesia (good if kitty has a sketchy heart or kidneys), but int neither of beam is stronger. Last I heard , if they still offer it, Washington State University was the cheapest by far. Otherwise you are getting close to five digits for treatment now.

Hypophysectomy surgery is in New York, so not a bad distance. There are threads here about the surgery you can read. We had three do it last fall, two as part of a donor program which made it much cheaper, the other in London. Cabergoline is the cheapest medical treatment, with mixed results but we have had three go OTJ. Long term effects are unknown cause it is so new.
I had SRT down twice, the tumour came back after three years.

That is rare, only two kitties I know of had it done twice, Neko as first. It can take two years for the treatment to take full effect, but Neko saw changes within two weeks, actually got dose reductions on the way home. Side effects are minimal. Like any treatment, you do have to be on you toes with testing, changes can come quickly then slow, then quick...... A lot of the symptoms went away, but not the arthritis and some soft tissue growth. She never went OTJ but her dose was below 1 unit.
First priority is to try to get her under renal threshold as much as possible. Many acrokitties do better on Levemir.
How is your girl’s heart? Heart issues are common and can limit treatment options. How long do you think she has been acro? Neko did not have a belly but did have the appetite.