I would think that if you are going to do that, you want not only to store a large number of PDF's with chords and lyrics . . . you also want the ability to search and locate the desired song very quickly.
In my opinion, the search and retrieve would go much faster using an iPad with an app such as Songbook+. Once the desired PDF is located, the app can also instantly and automatically bring up the corresponding registrations in Genos. You control your gig from the iPad.
The down time between songs is minimal. I have this type of setup.
Songbook+ also allows you to synch a second iPad for your singer . . .. where you will both be seeing the same PDF. (I have not done this part, but the SongBook+ user manual indicates that it can be done).
You might want to take a look at this idea.
Have a great day.