CIT, megatharium, what's the difference?

I received a quotation for antlatlry department at camp and was surprised when the total cost would be under $1000 including targets.  This of course, does not include labor but hey, that’s what CITs are for.  Now, I’m trying to find appropriate targets and am wondering if instead of using many targets like say a foam deer, I can save money and just buy one foam mastadon.  I know Scouting doesn’t permit shooting at animal likenesses but in this case at least the kids won’t have a gut reflex to shoot at the damn thing since it’s been extinction for 10,000 years.