Then, for example if you don’t provide a fridge (which we recommend you do not), you will deduct the amount for the fridge as well.

I can imagine it is considerably more work as well as I plan to manage myself.

That never ends well.

Well that is unfortunate.

I would confirm this with someone a little more well versed in NYC or give them a call to see if they can answer your questions.

If your leasing application process is thorough and well thought out, and if your lease agreement has been well drafted by your local attorney and if it includes clauses that permit you/your property manager enough latitude to maneuver and anticipate undesirable tenant behaviors, both actions and inactions, and you have operational processes which align with enforcement of your lease, then you've done all you can do to reduce this inherent risk of an undesirable tenant.  

Be sure you consult your agreements with them as well to determine if there is some other action you are responsible for.You may also want to contact your insurance to find out if and when they may step in and do something.

They are beginning their investment journey there as well.

Staging your house well can help you attract more attention from buyers, which ultimately helps it sell faster and maybe for a higher price than an unstaged home (see visual):What Are My Staging Options?

It's your job to create a buffer between the tenants before they start fighting as well.