1 x Engineer/Year = EUR 0.2M (Cost, not salary)
5 x Engineer /Year = EUR 1.0M
50 x Engineers, various hangers on/Year = EUR 10M
11 years x EUR 10M = EUR 110M
Buy some aircraft and spares = EUR 20M
Do some travel and schmoozing = EUR 20M
All made up of course, but it doesn't take much to get to a number of that magnitude.