Exactly what I was going to point out. Hippos are dangerous. They kill more people than sharks, if I remember correctly. (If so, then they are actually the most deadly water animal.) Hunting them is one thing, but ranching them? That just inviting trouble.
Ranching and farming should be done with domesticated or at least non-aggressive species.
I keep seeing this as “raise hippies…as a meat animal”. I suppose it’s possible: meat animals don’t usually eat meat themselves. And they’d be free range.