So what we do have is their driver's licenses and SSNs for all 4, one employer (military base), cell numbers for 3 of the tenants as well as a number to a new business the step father started (I saw the number on his car; no actual location or address exists for this new business that they likely operate from their mobile).Thank you for the suggestion on the collection service and for all your feedback. 

Once the buyer signs the assignment contract, you’d deliver that and the purchase and sale agreement to the title company. 

Thus he’s more in the drivers seat re non price terms 

However have heard of people switching their driver license over, locking one of the bedrooms up, throwing some stuff in it and claiming they are occupying the place.

I get my letters printed by a local printer and then hand deliver door-to-door.

I write the lease that it must be delivered back at the same level as they received it and you take a picture of the gauge on occupancy (or differenced is reimbursed at the current rate).

If the properties are in Los Angeles, Exit all of them immediately and let someone overpay in the current LA market, Then purchase an apartment complex at the Institutional grade that will deliver you a couple of million a year in cash flow.When I worked in Private Equity and a new client showed up with over 20 million worth of debt free real estate spread out over 15 or more properties, It always surprised me that consolidation into one asset never came to mind.   

It is a economic driver meant to ease influx of investments.

We live in a society that you can earn money anyway you can think (driving a car, delivering food, charging a scooter overnight).

I wouldn't think it would deliver that much value unless the unit is small.