Thanks! I will need to look at Roll20 and Cartography Assets. ArtStation and Designcuts are good suggestions too!

I've DMed a few campaigns, but I never used much in the way of maps. I tended to just use automatic generators for the dungeons and rough sketches for my own reference. Most of my RPG experience was just with friends or with the RPG club at my college. We never used figures, battle maps, or the like. I know there's a lot of other ways of doing it that I haven't seen, and I certainly don't assume I know what the RPG community needs or wants!

Since my audience is basically all authors, I don't know that I could do much with a Patreon or what I'd do a Kickstarter for. The authors I work with mostly need custom work, and premade maps aren't as big a thing there. Which might mean I need to find a new audience to target.