Anyone recommend how I could stay most up to date with air bnb polices in New York, more so queens and Long Island areas.

If I'm following your logic correctly, your situation is:You have a previous HELOC on your primaryYou want to refinance to new rate/ termYou'll be paying off your HELOC from some other source prior to the refi (NOT via a cash out during the refinance)If that's the case, you shouldn't have any difficulty (other than perhaps some loan officers not being up to date on the regulations, or having other weird overlays). 

I'm flexible about anything about this meetup (dates, topics, place...) since it's still in its inception.

You negotiate 6% seller assist and closing date of April 1st.

They'll have the most up to date information available.

Click on dates that are not booked and see what they're charging.

It's really easy to listen to a guy that started 2 years ago talk about buying 40 properties and want to jump in full speed.

You’ll just want to look closely at your renovation timeline and be sure you don’t have too much cash in the funds account on your first testing date.

If building hasn’t been depreciated, add the basis and start the depreciation starting the rehab complete date/ when it was rent ready. 

Date you wish to move in6.)