My advice would be to seriously reconsider their decision to move to NYC. If they're trying to get into a high-powered job like law or wall street, then the move might be feasible (but then they wouldn't be worrying about high rents), or if they're into the "art world" then NYC is a good place.
But if they are regular middle-class guys trying to work in Manhattan, it's a nightmare - the costs are incredible, and no matter where you live, you lose. If you go the suburb/commute route, you're stuck in a sardine can subway 2 hours a day (if you want to live in a decent neighborhood), jammed shoulder-to-shoulder. you wouldn't believe how stressful that can be. and if you try to live in Manhattan, rent will cost most of your after-tax paycheck, even if you share a roach-infested studio apartment. And forget about having a car, between parking and insurance. Add to this that the people there are the most rude, hostile people on earth, along with the constant noise, dirt, homeless people, crime, etc.
Not saying its not a great place for some people - if you're super-rich and can take a limo to your park ave. apartment, its great. but if you're not that lucky, its not worth it.
JMHO