Get a large 50 x 50 thick cardboard sigh and stand on a busy internection with the words "We Buy Houses" along with a phone number7.  

Just because it's 12mm doesn't mean it will last. 90% of the thickness is glorified cardboard.

The issue really comes down to money because a non renew doesn’t account for getting back pay -an eviction does . 

I read that credit card payments and payments made through online platforms like PayPal, etc. are exempt from filing 1099-NEC as these payments are being reported by the card issuers and third-party payment networks.

If it is an ADU (not a duplex) and does not have a permit or got its permit after 2018 you likely will have an issue renting it as an STR.  

Most are so slight, as in your case, that they can be shimmed up with cardboard or scrap paneling if you are going to use a floating floor like laminate.

If they screw us, they had better be ready to live out of state for the rest of their days, or a cardboard box by the week is the best living situation they'll ever get approved for.

You may want to know the cutoff date in which your CC issuer reports their balances to the bureaus.

Would it even be an issue? Real

although i'm not an expert on that area of NJ in particular i can say for certain that you shouldn't have any issue renting the other units at least in the summer months, and at the rates for even a weekend you may be able to offset the cost of the mortgage for the rest of the year and not have to worry about vacancy in the winter.