When I was doing my DM and Instructor “internship” at the LDS it took over 4 years. The courses themselves are a matter of hundreds of hours. All things considered, not a very long time. The reason it took so long was I had a very good mentor/CD. Some could argue that I worked all of those years for him (a ½ day and one night a week) at the shop, for free – but, boy did I gain a lot of experience.
If I remember correctly DM was $600.00, Instructor was $1,500.00. Plus at Instructor level, you have to buy most of the Instructor training materials (could be as high as $2000.00). I was lucky, believe it or not I found a complete set online for $200.00. All current. All perfect condition.
All of the DM’s, Instructors were asked/requested to wear his brand. But, we got it at 40% off his list. As a full Instructor, I received my gear at cost plus shipping. The reason stated above about sales is correct, but another reason we got such “”good deals” on our equipment is that you beat the crap out of it. You can easily go through 2 BC’s a year.
Now with that said, we had a fellow training for DM around the same time that I was. He had different equipment. It was agreed that once his equipment wore out, then he would get the deal on the new “stuff”.
Quite frankly, this is one of the reasons that I am an independent Instructor. I’m not crazy about the concept of Instructor selling equipment. The way I approach it now is I will be a “consultant “to my students. I’ll help them make the right decision for them. I don’t make a dime on equipment.
Also, I'd advise against the "quickie" approach "90 days and your an Instructor". If you plan on Instructing in NC get your training in NC.