as of now, no, and to tell you the truth I don't think they're going to make a 4th, sorry. But another excellent game (It's not a series like STH) is caravaneer at sugar free games, it's my all time...
When Niko first arrives, he lives in a very scruffy apartment with Roman in Broker, but that is lost to them in a future mission.
The next place they live in is another, rather less scruffy...