Because of my current pieces being larger I have also had a problem hanging them on my display wall which is somewhat narrow and situated between two doors. For some time now I have been working through ideas for a satisfactory way to solve this problem.
Last week I did it. I purchased a metal rod, three brass cup hooks and hunted deep for six large dog clips which I knew I had somewhere. My studio has an open ceiling and rafters. I screwed the three cup hooks under the rafters and these now hold the metal rod. Then I placed the dog clips on to the rod. Now all I have to do is climb up on a chair, slip the top edge of a piece into the dog clips and hey presto, my piece hangs beautifully. I may be able to get back further too for photographing although I will need to stand on a chair.