I’ve done a lot of thinking on this too, and my favorite solution would be a second octatrack.
Now, before you freak out, just think of the CDJs - they’re also about $1200, and you’d never think of doing a gig with just one of them.
You could get a CDJ (or similar) and run it into a mixer with the OT, and make nice transition tracks burned to CD to play while loading, this is a cheaper option.
But mirrored octatracks would be mighty sexy…
2 cents given!