i always wonder why people with some specialized "know how", don't just do it themselves - why sell such good information?
Most do both. You won't get very far pretending to be an expert without a track record, but if you are successful there are hundreds of thousands of people willing to pay for you to teach them how to do what you did.
As for the course itself, 12 DVD's? Really? Snoozer... you better get their money up front, because they won't make it through disc 2. In fact, they probably won't even buy it because who has the time to watch 12 DVD's?
If you actually want to make money with this, do the 12 part set but make the first disc free. Make your money on the $6.95 shipping... and then do your best to make that first disc so compelling that they'll want to buy the other 11, but don't count on it. Most people will never buy discs 2 through 11, but you got $7 for shipping them a 30 cent DVD + $1.00 postage, so you're still making 5 times COG.
Remember those commercials for Video Professor? "I want to send you a free disc, just pay postage, because I'm so convinced my crap works you'll buy another one." ... now lets run that through the B.S. detector and see that what he really was saying is "I just want your $7, because if 1 Million of you give me $7 then I made $7 Million and I really don't give a sh-- if you ever buy another disc."
That's how you win with a DR product. :)