Yeah, going the desktop mixer approach is another good option. Definitely the potential for lots of inputs. My friend, Lampeo often uses the OT as a mixer, advantage being that you can incorporate the OT's effects. If you can bus your rack (and anything else) down to work with the OT's 4 inputs, this could be an option.
I'll likely look into some in-the-box (Eurorack) submixing options to keep using my 8 ins on my interface. Using that is nice because it's less bulky than most hardware/mixers/outboard effects. The ABC should do the job for three stereo pairs, I just need to sacrifice being able to treat each output individually.
And yeah, I had't known that Elite wasn't shipping worldwide. Oh man, I feel for you.
Well, wishing you the best with your adventure.