It appears to me that you seem think there is a Job waiting out there for you when you finish the rating as you will have a 150hrs on type there are plenty of people out there with 10 times that who are out of work and I will say it again these people are in the business of selling type ratings nothing more they will allways tell you the positives (chance of a job etc at the end) and not the negatives
Why not ask them for a list of how many people who have done this have actually got kept on and ask to speak to them they should have nothing to hide if they are a reputable company
Maybe im getting old but being in business myself most people will tell you what you want to hear if you are handing over that sort of money.
Of course if you do get a Gurantee of a job thats a different story
Good luck whatever you decide i hope it all works out for you