I don't know Needham very well, but minutes NorthWest is of course Wellesley, where I know there are places that cater to students that would have any variety of large printers that should be cost effective.

Also look for Kinko's (some outlets let you email or ftp the files directly) and Office Max is now offering at some location a large format printer by Canon.

Make sure that you have a file that is at least 250dpi in both directions. I've had some experience with Hybrid/Merged/PS'd or Panorama Photos and until you print a few they are sometimes foolers. If you have seams, print sections of them with the seam in the middle on conventional paper or at your favorite photo place to make sure they're aligned well.

The Variety of papers is astounding and really changes the images. Most Landscape/Scenic that I've experienced if the contrast and resolution are good look better on a Luster type than Fine Art or a standard Matte.

I've been paying about $9 sq/ft for the past year or so to get some commercial work done and once I worked out how I wanted it to look it's been great! Two years ago the big drum printer at $6-7 a sq/ft was more finicky than some of the newer large Epson, etc. i-jets but the "chromic" inks are worth the price bump. Good luck!

C