Yes, that Bermpohl is pretty much what I was thinking in terms of a crooked/folded implementation. I was expecting it to be more-crooked, but it still looks pretty compact.
Anyway. I don't reckon it would be too hard at all to draw up the casing for one of these and have it laser-cut from birch or bamboo plywood. Total cost of the body should be well under $200; the hard part IMHO will be obtaining large, high quality separation filters.
Edit: not to mention an all-analogue tricolour printing process!