Another possible way could be to have a custom-grid for a MIGX-TV, where they can edit just one item, kind like done for migxMultiLang
Thanks for this link. It certainly looks promising, I've give this a try when I have time to test on my own practice site.
I can sort of see how MIGx will solve my issue. Reading now to determine how to limit the number of items. If I have a single image area, I don't want the user to be prompted with the ability to add more than one item. Maybe I just write that in the description for that MIGx TV "Only Enter One Image!"