I even program Arduino using my own dog food.
That's quite impressive, as are your programming experience.
I think there is a market, however niche, for something like this. I do think that rather than running it as a BASIC board, it may make sense to push it to "mini-PC", with the potential to run DOS and its vast library of gaming code on such a beast. Make it more like Raspberry Pi / CubieBoard, but DOS-oriented.
You can potentially get a lot more users that way.