Bob, glad to hear your monitoring of Ellie has allowed you to hopefully nip the issue in the bud. I hear you about "spending the children's inheritance." Specialized health care can be expensive, whatever the species.
We've had two canines with CA issues over-time, and I don't regret for one second the cumulative 'into five figures' costs of care. Fortunately we were both working at the time, and had the discretionary income to do the right thing for our canines. Now in retirement, if the need arises again, it's just another budget item, as our 'quality of health' is directly related to the health of our great little companion.
The first-time we took our shetland sheepdog into the vet, and got the referral to the canine oncologist, the oncologist told us, "it's an expensive process." I said, "it's like buying a used Toyota," when we were digesting the cost of the treatment.
The next time we returned to the oncologist for the current furry fellow needing care, I reminded the doctor of our reasoning for the cost of being similar to buying a used Toyota. She responded, "I'm afraid this is going to-be a step-up in cost, to a Lexus!" Actually the cost wasn't as-bad as that, but the care is definitely expensive. I hope Ellie gets-out the door with less-invasive procedures, and lower costs.
Since you like to wrench-on the vehicles, I'm gonna show a fix I decided to make, I wish I'd done-it a long time-ago! I have a '09 GMC pick-up I bought new, and over-time, the headlights developed cataracts. I put it-off, doing the sanding, until I finally decided, "time to fix it or to buy replacements." While it would be easy to go through Rock Auto for replacements, as I did with my wife's Camry, after one go-round sanding them, and when they got foggy-again, I just bought new aftermarket; I decided to once-again use the 3M kit I had for the first Camry headlight 'intervention.'
The sanding disc in the 3M kit is probably-about 3" and after using it for awhile, I decided I had better uses for my time. I broke-out my D-A pneumatic sander, and a 600 wet-or-dry, and resumed. Much-better! I continually wiped-off the residue frequently, and soon switched to an 800 grit. After I got done with that, I could actually see through the lens, and in an A-B comparison with the untreated lens, I felt-like one of those infomercial guys, touting the miracle product he's selling: "just look-at that transparency, folks!" Sand it and forget it!"
I did the opposite side and while it's not-done, it's much, much better than it was. I have to visit the body supply store to get some 1000 and 1600 grit wet-or-dry pads for the D-A, and once I use them, I'll try a polishing compound on a foam pad, the foam pad I'll make a trip to Harbor Freight, and pick a free gift for my troubles.
The dog was out of the Science Diet food/kibble, so last night after it got dark, I went to Pet Supermarket. As I turned out of the driveway, I saw light in-front of my vehicle again! I hadn't realized how-much the haze of the headlight lenses had affected my night-time vision. I had recently been thinking, "man, I'm not seeing so-well at-night, I've gotta get to the opthalmologist for a new-pair of glasses!" That, or sand-down your headlight lenses. When you take a look at the before/after, you'll see (again, as I did!)
Driving-around as I had been it was like having one headlight out, or worse. I still have-to finish things, but at-least I have my nighttime illumination nearly-back to normal.
I also replaced a failed relay for my WOLO airhorn, which had stuck on, creating an exciting minute in traffic, until the fuse popped. It spontaneously stuck 'on,' leaving me in the middle of the road, with drivers giving me the stinkeye at my continually-blaring horn. You need a good horn in south Florida, if-only to alert the texting driver drifting into your lane to get-off facebook, stop vaping, and pay-attention to the SUV's path before we "meet by-accident."