I have an Etsy store where I sell my illustrations. It doesn't make $500 every single month, but averaged over a year it is around that mark. I think I could grow the sales if I spent more time on it :-)
You could make more sales, and grow your audience if you streamed the creation process. I'd love to watch you put one of these together and would pay for that.
https://www.etsy.com/shop/rithmdesignco/