El-Co Color Labs (www.elcocolor.com) offers an internet only special for massive digital prints. Check out the special here.
If you want large digital prints for your Senior project, this could be a good source. Very few digital printers offer silver-based digital prints at sizes as large as 30x60. Their prices are much better than large format inkjet prints.
Here's a sample of their prices. You have to order a minimum of 2 prints to get these prices.Lustre or Glossy