About the training the lady is taking. There are some jobs where the training is done and then only those that pass the training are offered jobs. It may be that there is a loophole in the system such that she has lost her subsidy since what she is doing isn't really training it is looking for work. I didn't think you could apply for subsidy till you had found work since the amount of money you get depends on your salary. What she will be able to do is to claim on her taxes any amounts spent on daycare while she is looking for work, taking training, etc. so maybe that is what you were thinking.

First question for me would be if she has a place in licensed care reserved for when she gets the job and gets her subsidy back which means she won't be in your care very long.

At the same time given how the interview went I wouldn't be offering them a place either. Last thing I would want to put up with for such a short time is a rude demanding 5 year old.