Simply providing information pertaining to legalities.

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Hi Lawrence, Here's my short advice check Due Diligence, Understand Owner Financing Terms, Seek Professional Guidance, Market Research, Financial Analysis, Risk Management, Long-Term Vision.

Some people see it as a way to get into a multifamily house at a lower downpayment and interest rate, while still providing themselves a place to live.I think the only way it would be "wrong" is if it puts you in a situation you can't afford or makes you "house poor".My husband and I rent out 4 of the bedrooms in our house plus a bonus room, meaning we have 6 roommates, but our entire mortgage is covered.

That will provide you the higher end rents. 

Any direction you can provide to locate deals, and advice on the area in general would be greatly appreciated.

With that being said some other providers out there will not be willing to do what you're doing in vetting your clients.

Is there a professional I can consult with on this?  

You need STR insurance, not a homeowners policy.Don't depend on any insurance provided by a listing platform. 

New York City allows members of the public to have roommates in both single-family homes and in apartments, provided that these roommates maintain what is known as a 'common household,' meaning they share the livable space of the dwelling unit," Under the NYC Administrative Code, no more than three unrelated roommates can occupy a dwelling unit and maintain a common household, which means you can take on one or two roommates.