What does Genesis 30:29 mean?

Jacob has demanded that Laban allow him to leave, to take his wives and children and return to his own people (Genesis 30:25). Instead, Laban has suggested that they strike a new deal. The implication is that Jacob will be without any property of his own if he were to leave at this point. As a servant in Laban's household, legal practice of the time would have suggested that everything in Jacob's family belonged to the master—including the wives and children. Without permission, more than likely, any attempt by Jacob to leave could have been seen as an act of theft.

Now Jacob begins to make a proposal of his own. He starts by asking Laban to admit that he knows both that Jacob has served faithfully and that Laban's livestock have thrived under his care. This seems to be the motivation for most of Laban's actions: personal prosperity.