Head over to Bfold on 13th St, between 2nd and 3rd. The owner, David Lam will have several options for you and will surely hook you up with something. I have the same situation as you, though mostly I drive into Manhattan to bring my young son to school, my wife to work, then I park my car and bike 12 miles back to Queens. I have a Brompton that works quite well for me.