I am moving to NYC in a few months and am nervous about taking my road bike with me (caad9) so I'm looking to get a cheap(er) single speed bike to use for commuting and medium rides (~30 miles max).

Wish list
#1 - Light weight (I will be in an old building with a very slow elevator, will need to carry the bike
#2 - Maintenance free - no space in the apartment for a bike stand/etc.
#3 - not too flashy...would like the bike to not get stolen

I definitely will want a bike that can support brakes

I'm willing to do some customization, and spend up to $800

Thanks for your help!