Sure, being niche is key, but not too niche I think. And of course, you need to be good at it. Don't get discouraged, you need a bit of luck but hey, I for one do it because I wanna share thoughts and start discussions :)
You surely succeeded in that here, and, well, my up is worth just 1 cent, but, I might check in later too :)
Also, I for one would be interested in 3d modelling, though I think that is best taught in video form rather than text with stills. Just keep at it if it's fun for you :)