Making a mark

I have been browsing the Internet looking for ideas for signature quilts. Next year is the 50th anniversary of the National Trust in Queensland, and the 160th birthday of the Trust property, Wolston House, where I regularly volunteer. I have been asked to make something for these celebrations on behalf of the volunteers, so I thought that a quilt incorporating all our names would be good.
I found a few ideas...

Image found here

Image found here

Image found here

... but I thought I would like to include a picture of the house or in some way make it not just about the names. I suppose it would end up as a wall hanging; we have about twenty-five regular volunteers.

 Has anyone made something like this and have some suggestions for me? I need to make a decision about the signature block at least before we finish for the year as our Christmas get together would be a good opportunity to gather signatures.