I paid $800/m for my room in my old apartment on the Lower East Side of downtown Manhattan. I had one very respectful room mate and it worked out very well for me. I gave up the apartment because I'm moving in with my boyfriend

eek: first for me).
So it's possible to find $800-$1,000 rooms in manhattan, but don't think you'll have a west village penthouse all to yourself

. Craigslist is the best way to do it. Put it in your favorites bar and check every time you sit down at a computer, and every 15 minutes while you're at the computer. You'll want to be the first email that shows up in their inbox.
Getting from the other burrows to manhattan is easy if you can get to the subway. Here is a subway map:
http://www.mta.info/nyct/maps/submap.htm
I used to live in Bed Stuy/Bushwick, Brooklyn, off the J and Z trains. I loved my neighborhood, but HATED taking the train so much. The JMZ line is often referred to as the "doo doo brown line" (okay, I'm the only person that calls it that) because it sucks so much.
Good trains to live off of:
The 4, 5, 6 - trains come often and are quick.
The E, F, G, R, V lines in Queens. If you take a look at the map, you'll notice that a bunch of the lines connect to form a common line in queens (above brooklyn, to the right of manhattan). One comes every 3 minutes during rush hour. Very speedy and nice.
Bad Trains: J, M, Z, G.
All of this is relative, however. My sister lives off the G, and she loves it. It takes her at least an hour to get anywhere in Manhattan though. I, personally, can't spend that much time on a train every day. I'm a walker - I walk almost anywhere I can get in under an hour.
Don't be afraid of the burrows. They are all great, and all have something to offer. Most of Manhattan is VERY uppity and I find that it gets old fast. Living in Brooklyn was very refreshing in that respect. The lower east side isn't so uppity (note: east village, as close as it might be, is VERY uppity), but I didn't feel the sense of community that my neighborhood in Brooklyn had. Another good thing about living outside of manhattan is that everything is half the price. There's great dollar stores and cheap bodegas in the burrows, and expensive stores in Manhattan. So you save on more than just rent living outside of Manhattan (groceries are a lot cheaper too!).
Now I'm living in West Village, which is an awesome neighborhood. It's quiet compared to other neighborhoods, but still has an awesome nightlife. Great restaurants. Great, quiet vibe. If you can find a cheap apartment in West Village, grab it. But you'll need a lot of luck to do so - west village is a very expensive neighborhood to live in.
If you have any questions, just say so

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*Emerson