Thanks for the advise! My understanding is that Blue and Gold rams need higher temperatures like 80+, but Bolivian Rams like it 72-79. I was planning on aiming for 77 or 78 in this tank, which should work from what I've read so far.
I definitively plan to include several good hiding places and add the rainbow shark last, so hopefully he'll only claim a small cave. But, I can try something else if they can't get along.