If everyone else is in the same one, transportation is fast, convenient, & cheap.Yes, but New Jersey is still in Earth's gravity well.
How much do you calculate shipping to be?Luna has less mass and no atmosphere. Products made on the moon can be sent into orbit with a mass driver, making it much cheaper and much more secure than anything started from Earth.
Consider caves created by lava tubes.As @Pogo said, Luna may be not be the best option for a colony, but it is an option for a production hub (if the future need for metal hulls justifies the initial costs).