The way I read the charts on the linked page, and the various other pages with the same sort of chart, it doesn't read to me like it works in any way to reach that sort of cost.
The way the chart reads to me is that Manuscripts increase in cost for every 10 made up until 91, and then never increase in price again.
Tomes increase every 20 up to the 81st made, and then never again.
Codex's increase every 30 up until the 61st made, and then never again.
Otherwise why is the manuscript section shown with 10 increments, the tome section shown with 5, and the codex section only 3.
Maybe that's the cap someone discovered.
Maybe it keeps going, but noone has been able to make enough to get that far to know for certain.
If it does cap out at the points in the chart, the costs will still be considerable, but nowhere near those calculations.
If it doesn't cap out, then we've certainly got a problem.
Edit: Actually, our German friends tested and confirmed those as caps -> http://forum.diesiedleronline.de/thr...l=1#post858621
Edit 2: This means that your 7th specialist (and all specialists from then on, forever), not counting the level 50 skill, need 10 codex, 40 tome and 210 manuscript
210 manuscript are 5040 gold, 98700 nibs, 123900 simple paper
40 tomes need 200 scripts (from the 210 above), 16600 printing types, 24200 intermediate paper
10 codex needs 30 tomes (from the 40 above), 4000 fittings, 5600 advanced paper
I'm a little tired, someone correct that maths if it seems wrong.