Mine is large and also in community so I agree the hype is more than the reality, I do house mine with large fish however and upon adding a 12" Datnoid, aimara is 24-26 inch he did have a nasty grab of it which led to death, he also would heavily beat up a 20"+ tigrinus but the Tig wouldn't move out the aimaras territory.
I think if you're careful with tank mates you can get away with it.
I was curious re the dollars though as they're not a large fish really so could easily be harmed even if they couldn't be eaten.
I may have to move a shoal of 13 wide bars at 8" with the aimara which I feel a little nervous about
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