In the past late fees turned to non payment, turning to evictions.

I would contact an attorney ASAP and start the eviction process for non payment of rent.

IE- more stable income, more tenant references, and the biggest reason-they are willing to pay an additional non refundable fee for their pet. 

I would suggest looking at neighborhoods around that area -- for instance, Port Richmond is a NL/F "lite" area a bit north, but rents are up and home prices are not (non-new construction).

I️ assigned a property to an end-buyer, and he signed a contract to pay a $750 non refundable earnest money deposit.

See how nice and helpful people can be when the situation is correctly stated :) @John Andruszka   SO Ya your next step is post pay or quit then file for non-payment, eviction, she's not gonna pay you a dime. is my bet and I bet I'd win that bet..You have no guarantee she'll pay rent, you've given her 2+ extra weeks to move..

Hey @Makhwarand Khan I collect a $100 non refundable deposit (i would refund it if the background check DQ'd them, but haven't had to cross that bridge yet)  at the showing to lock it up. 

Let me ask this: How are you going to hold a non licensed contractor accountable IF something happens?

Leaders in Washington can wish and hope to turn the tide all they want but the train has left the station, personally I believe the we will revert back to Obama era policies of non-interference for law abiding business.

It depends on many factors;- Available capital- Access to financing- Prior non-real estate experience (e.g. project manager)- Team (e.g.