Hi Georganna,
Wall-sized displays on the wall seem to work fine. Here's a suggestion if you'll like to consider that route. Draw up the family tree or family diagram in a software on your computer. There may be genealogy programs to assist with this, or if you're good in Microsoft Word or even Microsoft Publisher or Microsoft Excel, nice charts/diagrams or trees can be generated. Set the paper size to something larger than 8.5 x 11. If you have access to a printer that prints on 11 x 17 paper, generate your tree/chart on that size. The larger the size, the more branches or information you can include. After designing your tree/diagram/chart on your computer, print it out on the 11 x 17 paper, and take the printout to OfficeMax, Kinko's, or any printing place for them to blow it up to wall-size. I did this several years ago and was quite pleased at the wall-sized prints. Also, it was inexpensive, so you can perhaps have several trees printed out and displayed on the walls. By the way, if you do not have a printer that prints on 11 x 17, save the file to a disk, and OfficeMax, Kinko's, etc. can likely print it out on that paper for you or provide a computer.

Mel