sounds better than my brother's two adult Dats that he keeps in a 55G . . . makes me sad every time I see it . . . kind of like a pair of Oscars in a 30G . . .
As many have said, it would not be worth if i you are doing it as a money making venture. Factor in food, SDS, and other unfortunate circumstances i would suggest doing it only if you like Dats but don't really have any more options or a larger tank.