During my research I found a great website called Quantcast that will offer analysis of websites, I have an unconventional suggestion; track the main website from Quantcast. This analysis will let you know where the traffic is coming from and where it is going to, which is a good way to know if the information you have on Facebook is driving traffic to and from there. Having the analysis from the main site can help you know who your audience is, this is a good way to know how to tailor your post on the Facebook fan page, which images were viewed more on Flickr and which videos from YouTube the traffic came from. It gives the charts of the peaks of traffic and when it falls and when it steadies, this way you know what attracts viewers.
Quantcast services are free to track you information, it offers many services to boost your audience appeal. Facebook also offers tracking services for free as well. The budget would mainly consist of hiring a photographer for the images, which would be per event that would cost $400 minimum with at least three event a year, part time person for social media, which can be $13 per hour, working a 20-30 week to set the campaigns and schedule all the postings. This would be around $11,340 per year for your budget.