So lemme get this straight... This guy wants to make a project to create a deck of cards that I can probably find in almost any decently-stocked magic shop?
That was my thought. I would assume that there is a gaff deck that has a few double faces somewhere. I'm not a magician, but do you really need 52 double faced cards? Maybe if you are doing a trick where the card is destroyed, and this deck had multiples to be able to gaff standard decks.
The other side of it is, if there is not a gaff like this in the market. It could be cool, but he needs to put out a instruction DVD of tricks for these cards.
This has been done before, even on Kickstarter. The one KS project I've seen prior to this was for a double-faced deck where there was a specific correlation between faces and "backs" - they were matched together in a specific pattern. Most such decks aren't done in such a way.
He's producing this with a specific purpose - creating certain face/face combinations that he considers desirable for reasons only he knows. But as I see it, there's no need - there are already some specialized gaff decks out there with specific combinations of the type he's talking about. Maybe not all of them are in there, but what one person considers desirable and what another considers as such are likely to be different.
What makes the least sense to me are the "SBS" cards - same both sides. I'm a little hard pressed to see the need for it.
Regardless, if he had specific cards he was looking for - there are companies that sell individual cards of specific combinations, professionally made. That can even be a better alternative - pick and choose the ones you want, don't pay for an entirely costly deck of which you might use only a few cards.