Seminars are a great way to reach a lot of people. You might as well share what you know. Create a catalogue. Most service industries have trade journals. However, there may not be a catalogue of the supplies, information, or goods needed for those businesses.
Someone involved in an industry is a likely candidate to create such a catalogue.
As a sole owner who works seven days a week to make ends meet, you may find it difficult to allocate time for changing your business's direction.