Do you plan on offering this in a format suitable for 'self-learners' (i.e. similar to the TMBG audience)? If so, what would that format be? If you're compiling a list of potential buyers, put my name at the top of the list - take that as encouragement or pleading, but I would really like to see a product like this coming from you.
In the six months I used TMBG (I'm old and slow) I went from nothing to being where I had hoped to be after a couple of years. And, as mentioned previously, enjoyed the process - which helped enormously to keep me going.