Thank you! That gives us a start.
The 4e BBB has a total of 352 pages with ink on 'em, so if we assume $5/page that's $1760 for layout. Call it $2k. Very doable so far! And theoretical projects for2e Champions, Espionage!, 3e Champions, Danger International, Justice Inc., etc would be even more affordable on a per-project basis, assuming there would be demand for new prints of any of them.
I wonder how much data entry and copy editing would cost per page. 🤔 Back in the 90s, we were paid a pittance for writing supplements for Marc Miller's Traveller, and I gather that hasn't changed much in the intervening time. I wonder if copy editing has become better paid now.