Concept: Cthulhu Chessboard

This has been done a few times already, some are just the pieces from what I've seen, some a really good and some are just decent, so I doubt I'll be setting the world on fire with this idea but I'm looking to create a very limited edition Cthulhu themed Chess set along with a board.

Right now it's in the very, very early concept stage - there's nothing even on paper yet. I do know full well if I'm going to do it, it HAS to be awesome to hold up against the work already circulating out there. My basic idea is to do all the pieces, much like the others that have been done and to do a fully sculpted chessboard as well - I've spent more time concerned about the board than the pieces themselves at the moment.

So far I haven't seen anyone who has done a full board as well - but feel free to correct me if I'm wrong, I just haven't seen it myself in all the searches that I've been done. I saw something that looked like a custom board, but it didn't really scream Cthulhu when I saw it, so it might have been totally unrelated and just used to show off the pieces.

It will be a non-traditional looking board, at least I'm hoping that'll be the case. The pieces will all be as uniquely styled as I can manage, using various Lovecraft creatures and my take on them - trying to keep them as close to any current ideas of how they should look as well.

I'm going to make 5 of them, cast in aqua-resin. I like the stone type feel of aqua-resin, it's feels more expensive than regular resin and actually is more expensive I believe. And if I can figure out the process, I've seen it done, 1 set in pewter - but it would be tinted pewter to make telling the side apart easier. The pewter set might not happen if I can't figure out some method of tinting, although I've seen other do it a quick search turned up nothing but a few images of it having been done. Nor do I really understand anything about the quality of tinted pewter, other than it does look nice.

The price would be expensive as well, based on the time spent, cost of materials and overall uniqueness of the final pieces and board as a sculptural piece of art, however I'm also trying to avoid overpricing. I did some looking around as well on what some others were charging, some I think were way too high considering the materials used were incredibly inexpensive, and some were very reasonable priced for the exact opposite reasons.

I'm looking for any feedback on the idea if possible. Has it already been done to death? how much is too much to charge? Is 5 sets a reasonable number for a limited edition? Concepts to avoid and ones to focus on that might not have been done yet by other artists? Anything would be appreciated at this point and I'll keep things updated as I work on the idea over the summer - I'm hoping to have them ready in the early fall.