My specialty is working with investors and business owners in locating island based cash flowing rentals and or non rental second homes. 

It is on the boarder next tourist areas and the island.

I have a lot in East Rockaway, corner that I am helping the owner find a buyer...Trying to get more info on like zoning and how much you can build, Property shark has been useful in NYC but pretty useless in Long Island, can not even find basic info there, is there another website or resource I can use for more detailed property info?

Where we go down is a side branch which has shallow water, next an island and then the actual river.

Interestingly, I live in my community (Marco Island) with my short term rentals and have for years.  

I live on the East Coast and I too am an out of state investor primarily since Long Island is a particularly expensive area as a whole to invest in. 

@Bryan Cavellier, You can 1031 with any US property including Guam, the USVI and ...drum roll- The Northern Marianas Islands (go figure but I actually had a realtor from there in a class of mine recently) into any other US or one of those territories.  1031 is a federal statute so it's applied the same in all locals with just a few variations state to state at the state level. 

Pete Beach and Treasure Island heating up, it might be worth tapping into that dormant potential.

I am wondering if there is any market in New Jersey, New York, Pennsylvania, Rhode Island, Connecticut, Maryland, or Washington DC that would "make sense" to house hack given my financial position? 

Check with these guys, I live on Catalina Island which is High Fire Zone and they were able to help me.