|1.||I'd marry into that|
When an attractive woman or man is the heir to a dynasty, an empire or has a family with a large business and/or is well connected so that they will most likely have a variety of resources both social and financial. A way to say to I'd hit that, but with a greater level of commitment. They are attractive and rich, but also seem like marriage material. A way to marry into money, opportunities, make connections or achieve fame.
Guy1: "Dude, our waitress is really pretty"
Guy2: "I know, and her parents own the entire chain of these Chinese restaurants.
Guy1: "I'd marry into that."