I just bought a large Royal the other day, $120 fish for $30!!!!! Someone at the store mislabeled it and I snatched him up. He isnt the most active, not yet anyway, but Hes always out in plain sight where I can see him. Shreds my drift wood, poops a lot. What I would recommend is have a tank large enough for them, as they do get big, and do frequent water changes. I myself, if he continues to produce as much waste as he does, Ill have to bump up to two or three w/c a week.
Hey, if you want the fish, you need to take the responsibility and properly take care of it. Non the less, beautiful fish, I like them.