At least on the east coast outside of actually being located in the hard urban part of the city, from what I've seen 1 and 2 bedroom apartments only end up being marginally different in price. For example, one of the places I was looking at had 1 bedroom apartments for around 1400-1500USD per month while their 2 bedroom apartments only increased in price to 1600-1800USD depending on whether you wanted a bit more square footage or 2 bath instead of 1 bath. Likewise 3 bedroom just notched up another 200USD and so on.