This might help the OP come up with a hybrid approach. Create tutorial videos, blog posts, whatever that have lessons with exercises. Publish them for free. People pay for you to take time reviewing their work and then meeting with them over Skype for feedback and personal instruction. Hmmm. I guess that doesn't scale too well either. You would have to charge $100+ an hour to make any money. Maybe you charge a small monthly amount for access to all content. I dunno. Actually speaking to the person with experience is key, but their time is so valuable that it stops being affordable enough for people that need it.