http://www.dcc.unicamp.br/~stolfi/voynich/99-12-26-scan-tests/f74r-300-c099.jpg
It must have taken me somewhere between 0.5--2.0 hours to fabricate that "lost" page of the VMS.
That is probably how much it would have taken for the VMS author to write and draw the real thing from a draft copy. Thus the whole book must have taken 100--300 man-hours, i.e. between a couple of weeks and a couple of months.