Be quids in - It means to make profit. When he/she especially does it without telling it to others, however, this is not necessary, just a frequent condition.
1. He is trying to be quids in by opening this shop, let's hope for him.
2. He tried his best for that project; if he succeeds he will be quids in.
3. Nilam tried his level best to be quids in, in his industry but his rivals kicked him out of the game.