There is no guarantees of jobs, or even passes for that matter!
That is very true. However the schools being mentioned have particularly good placement records with specific airlines. They are usually providing courses that are intended to lead to a "cadet placement" with an airline.
Whilst airlines usually recruit from a variety of sources, they also usually only do so at specific levels of experience. Obtaining that experience often proves to be the "catch 22" for many people. You only have to read these forums, and research generally to become aware of that point.
At the CPL/IR post graduate stage, a transistion to an airlines cadet programme is usually tied to a specific course of training and then with only a small number of training schools.
I am not sure how anybody "guarantees their money 100%" these days? I might be inclined to say leave it in the bank, but I am not sure that would be true either. There is always an element of risk, and of course you should sensibly do whatever is necessary to minimize that risk.
Your daughter and yourself should research carefully and look at all of the options. Importantly you should decide what it is
you are looking to buy?
If it is CPL/IR training that leads to the likely issue of said licence, then their are many options and price points available to consider. If it is a course of training that leads to the best likelyhood of an airline cadetship, then your choices are significantly more limited, and the price points are more expensive.
As I say, it really depends what you want, and that needs very serious consideration. I would reiterate the point about "no guarantees" but I would also be very cautious of anybody gesturing their forefinger towards something they have to sell which might be priced attractively, when that particular product isn't really what you are interested in buying.