Have you ever thought that people might pay to watch you work? I’ve paid to see plenty of people work in my time, and you probably have too. Factory tours and skill demonstrations are examples of instances where both individuals and companies earn an additional income by allowing the public behind the scenes to see ‘how it’s done’. Might your business or field of expertise be something that people would be interested in viewing up close? If so, it could provide an additional source of revenue either through paid for guided tours, or free tours culminating in a product sales pitch.
Only you will know what relevance this has for your situation, but don’t sell yourself short. Just because what you do may seem mundane and uninteresting to you, doesn’t mean others will feel the same way.