my suggestion...

it looks like covering all subject areas of 70-4XX exam needs.

If this school has a good reputation, then it worth to give a try at no cost at start -- i know you will pay it back when work for the school as per contract work.

you do need to read the contract carefully.

take a look this: www.appdev.com for course video cost per subject.

do not take self-pace learning by just reading a self-xxx book(s).