A commendable gesture for sure. However, if this is something you really want to do, there are other ways.

If I was a member of this FC, I would build a memorial at the FC in their honor, and likely ask for willing participants to contribute towards its construction. Another idea is to designate a certain location somewhere in the world of FFXIV as a spot to go to to reflect and remember this person. Things like this use resources that are already available, and are kept exclusive within the FC.