You would have to sign her over, then they would help her. But several grand out of hours is right.Just so you know, PDSA won’t help you if your cat needs an emergency c-section. You’ll need to go private, and that can be a few grand out of hours.
The current kitten “market” is overflown. Even reputable breeders are worried about finding suitable homes for their babies, and I’ve seen registered kittens being sold for £300-400 in some cases.
There’s no money to be made here.