I don't have a preference on two sinks. Coming from a house with limited counter top space I would never get two sinks and give up space. His kitchen seems big but not so large that he needs two sinks or should give up the space. Hell my brother has a 5x10 island in his kitchen and only has one sink, in the island. Beer pong works just fine.
this bro's got my first floor square footage in counter tops he's got the room