Be able to access multiple hyperlinks of a single feature within a feature class using the hyperlink tool as well as the identify tool
Doing some Ideas cleanup here. My first thought would be to use Attachments. I realize this was asked a long time ago, but now if you're in ArcGIS Pro, enable attachments, add your 50 attachments to the feature, and configure your popup to show the list of attachments.
Enable Attachments—Data Management toolbox | ArcGIS Desktop
Edit file attachments—ArcGIS Pro | ArcGIS Desktop
Pop-ups—ArcGIS Pro | ArcGIS Desktop
Retrieving data ...