My parents also share that opinion.

My parents recently purchased a duplex of their own and I've been looking for a multifamily house primarily in towns in Central NJ (Union County). 

It's a great way to cause everlasting problems and alienate your family.IMO have your girlfriend tell her parents that she needs to rent the property out for a profit because money is tight.

Is it worth setting up a parent LLC for my companies or keeping them all separate?

@Jeff Brower @Derek TellierI'm just a recent grad still living with my parents for free since i don't need to pay rent.

But I want to thank the academy,  my parents, and all the silly lil investors that did so much hard work putting up YOUR bandit signs, and spent so much money on DMM so we can get your leads...Thank you.

Its called rich parents lol.

Both of these structures offer the "parent" Series/Trust which can hold an infinite number of "child" series/trusts, so it would allow for the future investments when they approach.

Would anyone know if I need to setup a separate EIN number for the parent and each of the series under it or just have an EIN for each of the series companies only ?

Especially from a house his parents bought 60 years ago.