My passion is to be public speaker and coach or consultant on time management and productivity. Does this have a good market? My target market is entrepreneurs and business owners.
It all boils down to how good you are at selling your services and finding clients. As others have said, there is a need for this type of service, question is whether you are able to convert that need into clients.
I would start by doing some market research on how to find potentials and how to convert them into real clients. Only after you have an idea how to do this and, the effort required, can you decide if this is really for you. There will be questions regarding your credentials and why you are so good at this. Also, do not forget the value-add for your clients, how will you ensure they are getting value for money (and that they are aware of it).