Re: OMG i need liveaboard soon.
Some marinas don't allow liveaboards, or restrict their numbers - sometimes this is to comply with local laws. My town (in New York State), for example, limits each marina to a certain percentage of liveaboard customers, and the boats must be able to make way under their own power, ect (i.e. not derelict boats). Your best sources of info would probably be the marinas you are thinking of living at.
Your plan sounds risky - sailboats can be very expensive and there is a lot that can go wrong with them (and you'll be responsible for all of it).
I lived aboard for a year and loved it, but I wasn't doing it under financial strain, and I had about 3 years experience in boat ownership.
Western Long Island Sound