when your in a fund U have an interest in a fund that then has interest in RE and you are once removed from an control.

As soon as a tenant fails to pay rent, you can file a complaint without waiting 30 days or issuing a separate notice (unless your lease requires one).That being said, it could be a waste of time/fees to run to court because tenants in NJ may come even on rent (even after you win the eviction case) and then they won't be evicted: “The tenant shall have three business days after service of the warrant for removal to pay all rent due.”

added 2 walls, added an eyebrow porch, removed an exterior door.  

It this was my forum I would remove them without question.

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But given I've paid for snow removal like once ever, I don't know what I should offer someone who is not a "pro" and already has an idea of their rate. 

If you ask the manager to justify a fee and he starts hemming and hawing, move on or require them to remove the fee.

Our property was already functioning as a short term rental so it is furnished but they are getting rid of some of our furniture and putting in new furniture and they are just charging me for the removal of my items.

Assuming your property is in Utah (like your profile indicates), here's the state law from a basic internet search:In Utah, a tenant who abandons a rental property without notice is liable for the lesser of the following: The rent remaining on the leaseThe rent plus the difference between the fair rental value and the agreed-upon rentThe cost to restore the property to its original conditionThe landlord can also remove the tenant's belongings and sell them if the tenant doesn't claim them within a reasonable time.

Removing it cost us an additional $5k over our estimate.