I would suspect The course is well worth the $40.00.
Even if he covered what you may already have read, it is by nature we learn quicker by watching rather than reading.. Techniques, Practices, and the order that things are done are important and can change the taste of the product if not done correctly.
Bottom line is even the food handling and food safety part of the course would be worth the expense. In the end you may even have a local supplier for your casings and other items without paying for shipping. And lastly, he would be nearby to answer any questions you may have if you run into difficulties....
It's a Win / Win situation, you can't loose with first hand knowledge and experience.
Humphrey's DownEast Beast W/BBQ Guru