It would depend on whats wrong with the snake and what the prognosis is.

"Oh your snake has a RI, it'll cost ____ for the meds and visits to heal him." I don't have a problem with that, even if it were a couple hundred dollars. If i had the money available i'd probably spend even more if there was a pretty good chance they could help my snake.

"We have no idea whats wrong with your snake, we can run Tests X, Y, and Z to check for this or that but we may not get a definite answer and those visits and tests alone will be about $600..." Um, yea, sorry. I love my snakes but i'm not made of money. If that were the case i'd probably seek out help from experienced members on here and see what they advise and if they've ever dealt with anything similar. There are a lot of knowledgable people on here. If the snake didn't seem to be improving at all (i'm not even sure how easily it would be to determine that or how long i would wait...) then i would euthanize it.

The same pretty much goes for other pets too. Well, the only other pets i have are T's and a dog. I don't think you can take a T to the vet lol. For my dog i would spend a bit more. Even then, unless it was a very positive prognosis, i wouldn't spend thousands on vet bills.

This holds true even for myself lol. If i got cancer or some awful disease i wouldn't spend thousands of dollars on more tests or treatments. I wouldn't wanna burden my family with a ton of bills if there was a good chance i was gunna be checking out. Thats just how i am lol.