the demand is there. Advertise to get clientele.
I would start with the customers/clients that you already have. Leverage your existing relationships. They know your work, so let them know that you re expanding your offerings. Once you get one or two under your belt, use your skill set from content promotion to build your own website for your business. The great thing about the ppt idea is that you can work remotely for anyone, anywhere.
Here are some tips to help you:Tips for Public Speakinghttp://www.small-business-software.net/t��Tips for Powerful Presentationshttp://www.small-business-software.net/c��More Presentation Tips http://www.powerpoint-resources.com/