My situation: I graduated college in May 2024 and started a FT position at a public accounting firm in September.

Yes you can post listings from different areas into OneKey and they will still show up on public sites like Zillow/Realtor/etc.

Some of the laws in NY changed recently and you are required to obtain a certificate of no harassment, No permits will be issued until it is resolved.You will need to work with the current tenants for this certificate to be approved which can take up to a year or more, Definitely something big to consider.  

Flipping contracts won’t exist - it will be replaced by “wholesaler” obtaining an OPTION to purchase at a set price and selling the option.3.

Public Record bedroom number is different than the advertised bedroom number.For instance, Public record and tax assessor says 4, while advertised bedroom number on MLS/listing is 5.The listing agent insists that the bedroom number is correct and that assessor and public information are wrong.What steps do I need to ensure that the advertised bedroom number is correct?

You can find guidelines for determining material participation, the rules for determining who's a real estate professional and what's active participation, and the special rules that apply to the income and losses from a passive activity held through a publicly traded partnership (PTP) in Publication 925,"Basically, rental is generally passive unless you are a real estate professional, HOWEVER, refer to pub 925 for special rules.  

Not may people know this is a requirement and certification has to be obtained by Landlords doing their own management to management companies as they believe we are acting as contractors. 

In obtaining post-possession judgments for actual damages as defined in this section, the landlord shall not seek a judgment for accelerated rent through the end of the term of the tenancy.

On this forum I doubt anyone will be offended, but if you go to the general public you might want to rethink letting the prospective buyers know that you are ready to insult them for being Looky Lous or doing some "funny business." 

To provide an example, I was previously employed in the legal department of HHM, which at the time was a an affiliate management company of a publicly traded hotel development/operation company where we managed  the portfolio of  hotels as well as provided 3rd party management services.