Are you in North, South, or Central NJ or willing to travel to another region of NJ?
Are you willing to have a Friday, Sunday, or earlier in the day Saturday wedding?
These factors will save you more than you can imagine.
Is your $5k, for the entire wedding or just the reception site, food & beverages?
This can help you get started, it is the local "the knot" listings. . .
http://www.theknot.com/vs_NEW_JERSEY_CAR.shtml