Years ago I had an entire 25/28mm painted Roman Cohort (early empire, Foundry models) man for man - 480-infantry, 6-balista and crew, 30-horse auxiliaries, (a Tuma of cavalry), 60-archer auxiliaries and 1/2-dozen heroes (General, standard bearer, etc.). It was my pride and joy. After being caught in GW's second "downsizing" in 2003 I was forced to sell it off to pay some bills. I did get about $5,000 for it but I've never had the heart to paint up another force like it again.
Good luck with your project.
Former Director of Product Development, Research and Design