It’s the proximity to it all that is driving demand—Bergen County and GW Bridge, Lincoln Tunnel & Holland Tunnel, Congress Station & Hoboken, etc..

Keeping in mind you'll have interest payments to the bridge lender, closing costs to buy the property (most times hard money lenders charge points), and then refinance costs.

I'd love to jump in if there's reasonable amount of risks that I can recover if anything goes wrong, but my intuition says I might be crossing a very dangerous bridge, which is seeking hard money lender to start BRRRR without much money in my savingsI'd appreciate all advice that you guys could comment.

I've done quite a bit of renovating on my properties but I had a construction bridge loan that I refinanced into a DSCR when everything was complete.

The hard money lender's sole focus is providing bridge loans secured against the property itself rather than the borrower's financial strength.

How does a bridge loan work and what is the difference in a construction loan verse a bridge loan?

You are using FHA and taking advantage of a low down payment option with the caveat that you have to bridge the appraisal gap of $30k for you to realize 34% COC return.

Waterfront, gulf access, bridge heights, etc.?

If I am able to get a bridge loan from a lender to purchase a multifamily property for 1-3 year term, how can I refinance the property or get a long term loan? 

Commercial brokers, property managers, bridge debt lenders and title companies is my recommendation.