Life isn’t fair

A few weeks ago we (my family) put our dog to sleep. He was the sweetest, cutest dog ever. I’ve had him since I was 14, so he was getting old and suffering. The process was a tough decision, but at least it made sense…End his suffering, let him into doggie heaven (or equivalent in whatever you believe, or don’t believe).  But now, our other dog, Skylar, has a cyst on his jaw Why?? Why now?  It’s an agressive one…not cancerous, but will keep coming back even if removed.  If we have it removed, it will cost SO much money…about $5000.  Ridiculous of course, but my goodness, how do you put a price on your beloved pet? Especially one that is so young…he’s only about 7 years old.  So if we do the surgery, it will cost alot, and he might suffer, since about 1/3 of his jaw will be removed. And then there’s a risk of it coming back.  But then again, he might be just fine and the continue being the happy, cute fluffy doggie he is.
What would you do?