Back in 2005 I happened upon a semi-populated Addams playfield plus a broken Addams head missing boards, and built a game around it. Ended up using a parted out Dr Who for most of what I didn't already have, everything went together with minor modifications. Finding parts wasn't as hard back then. IIRC, the most expensive item then was an IPB NOS playfield going for about half of what one would sell for now. It was a fun project that my dad and I worked on together but I wouldn't do it again. Anyone starting from scratch has a helluva job ahead of them.