Hope Coco is recovering well. The £300 sounds more realistic, I paid more than that 4 years ago for Algie, although he had all his teeth extracted and some work to his gums as well.
I phoned not long ago and spoke to the head nurse she knows Coco and said up to 9pm will be fine. She said as soon as cats come round and are able to eat they give them food or a high calorie food depending.