So I am posting hoping for any further advice or recommendations that could help me avoid pitfalls or avoid wasting time. 

Are there specific advantages or potential pitfalls I should consider when structuring these activities through my LLC?

Having a healthy fear going into any deal can keep your sense sharp to avoid potential pitfalls. 

Starting with multi-family rentals and house flipping is a smart approach, and taking the time to learn is a wise move to avoid costly pitfalls.

A PMC is similar to any other business where there are lots of pitfalls, too many to name.3.

Wholesalers might avoid licensing to reduce perceived risk, though this is a double-edged sword since wholesaling has its own legal pitfalls.5.

Honestly, it is a lot of work, and there are some big pitfalls you want to avoid, but its not rocket science. 

There are indeed many tempting short-term investment opportunities in the market that look very attractive numerically, but their potential risks can easily lead to pitfalls.

Ideally, I'd like to find a balance between affordability and potential for appreciation.Also, are there any common pitfalls or things to watch out for when buying a multi-family property in Jersey City?

There lots of pitfalls in there for housing providers.