Danny,

It might not be necessary to put BIAB on the iPad at all.

If you basically use the PC as a playback device for your BIAB songs, you could export your set list as audio or as video (with lyrics/chords) and use an audio or video app to stream your set list.

Just a thought. Most music stores now sell devices that attach an iPad to the mic stand, so my guess is that a lot of people are using tablets in their live shows.