An easier route into the world could be selling Look Up Tables (LUTS)?
But yeah I think the market is quite big and I love how we are getting more alternatives now, like Affinity Photo/Designer/Publisher and others such as Sketch. I do think however when you get to that level you will almost certainly require a team. Plugins for them should be easier though, or, go down the iOS route - where the frameworks probably make creating such apps more accessible?