K.K.
I'm not exactly sure what you want, but I'll tell you my story. My daughter had learning disablilities when she was young, and we spent 2 years going through trainings and therapies until she was able to be successful in school without tutors, aides, or accommodations. For the last 8 years I have been providing some of those services locally. There are not many people out there providing one of those services, and parents could really use them! So I created a DVD and workbook series that I sell off my website. Since I did most of the up front work myself, the cost of the filming and graphic design was only $2000. I paid one company to be able to use their specific exercises, but the rest let me use theirs while only giving them copyright mentions. It cost me about $1000 to get my product copyrighted. I have a website with PayPal, cost me about $500 to get that set up. Sales are slow enough now that a friend of mine and I manufacture the DVDs and Workbooks. I have been marketing them at workshops I give monthly, and make about $1000 a month on the sales.
I am now working with a PR firm that specializes in social marketing. They know that I expect to eventually make 10 times the marketing cost of $500/month - in other words, make $5000 a month - as a result of the PR work they do. It is quite exciting, to go from teaching individual children, to being able to reach and help thousands of kids!
My advice? Fill a need at a price that people can afford, yet feel that they are getting their money's worth, and you can get paid for your time.
I love business and marketing, and would be happy to share any other information with you as you invent!
K. Johnson
www.pyramidofpotential.com