When we moved to our new home about a year ago, Mrs. Magic Margin was very generous in allowing me space to display my personal typewriter collection. Everything about the "typewriter room" has been a work in progress. The biggest problem for any collector is storage space. To display a typewriter is a large investment in shelf real-estate.
I've mentioned my love of the Expedit shelf from the mega furniture retailer, IKEA. Each cube is 12" square so any typewriter you display needs to be smaller than that. I have been able to display a large collection using this storage system, but there are machines that I don't use (because they need to be repaired or restored. I don't want to get rid of them, but I would like to have them out and appreciated. So, this was the solution:
I know that there are some in the Typosphere that might be a little hesitant to hang some typewriters on the wall, but I like it.
Each machine is custom-hung and the mount is attached to a stud. They are very secure. I don't know about the long-term effect that hanging would have on the mechanisms, but I imagine that it wouldn't be too different from storing them upright in their cases for an extended period of time.