The Landlord may consider all factors in granting or withholding such consent, including the potential assignee’s or sublessee’s financial and credit history or lack thereof.

My question is, why would you withhold any information from the person you now have to sign an agreement with to help you find a property?

We do background check, send them SAMPLE lease with Holding Fee Agreement.

This includes sources of income and withholding amounts. 

The tenant has not met the requirements of withholding rent.If the tenant claims they have moved out, ask them to state that in writing (email or text is sufficient) so you can enter, remove their belongings, and take possession.

As others have stated, a well-drafted LLC operating agreement should have language that would prevent management from withholding material facts and/or removal provisions for a manager who doesn't comply.

The tenant may also withhold rent, but in response, the landlord may sue the tenant for nonpayment of rent.

Further, you’ve never even mentioned using third party foreign asset protection trusts domiciled in Nevis in your post which shows you’re withholding information vital to success in the note business.  

I’ve never considered cash for keys as an option, and don’t recommend it but if there is a situation where someone were to do it for whatever reason, just be sure to withhold that payment until the tenant is completely out, property is fully inspected and found to be in acceptable condition and locks are changed. 

Also if he is just taking PITI into the equation, he is missing/withholding info about utility costs, stocking/supply costs, cleaning costs, etc.