It cost me £7000 for my cat to spend 2 days in "ICU", nothing surgical, though they did do a _cat scan_ and put him on oxygen.
I found the cost of insurance ludicrous given how expensive the vet was and how little the insurance would cover. Granted ICU is expensive, I would still expect there to be an option which would wouldn't cap out at such a low figure.
For such a measly cover, I would prefer to self-insure.