To move on from something can also mean to abandon it entirely. It's very common to say you "move on" from something like a relationship. That doesn't mean you keep going, it means you move past it. Given the "move on" proceeds "cut our losses" it could very easily mean she's saying "Look, this endeavour hasn't worked. We need to stop doing it and get on with our lives."
It very easily could be she's saying they need to "move on" from this whole drug dealing thing. Both the phrases "cut our losses" and "move on" to me, indicated she's advocating for stopping whatever they're doing.