If front-end UI components for enterprise apps are your "niche", then I'd suggest a 2-pronged approach: 1) Publish a library of pre-built, generic UI component

If front-end UI components for enterprise apps are your "niche", then I'd suggest a 2-pronged approach: 1) Publish a library of pre-built, generic UI components suited to a particular domain. Use a license like Creative Commons to charge for commercial use, but make the library available for free trials. 2) Offer hourly consulting services to enhance/adapt the components to specific needs.