I love the Tiger Cowrie, and kept buying them about 5 years ago. I found that they'll eat an entire piece of Romaine Lettuce in a few hours.
However, back then I always had high nitrates and they would die within 1 to 2 weeks. They are fascinating creatures, and I bet if they were fed well, they'd do well in a refugium that had traveling space.
Heck, I might get one if I see one in the LFS again. It's been years since I've seen one. I don't think they do well in a reef tank because they are like little bulldozers and would topple corals as they travel.
I need to read that rko article linked above to see if I'm pointing you the wrong way.