I would have to get with the property manager and mimic the exact plans they have set up in the lease, all of which were probably customized by the PM to get a few extra dollars.  

Low value markets might be Pennies on the dollar like you allude to. 

For a few thousand dollars in rent, it is worth the call.If you don't get satisfaction there, credit card companies are regulated via The Consumer Financial Protection Bureau (CFPB).

Investing in NNN lease (Walgreens, Dollar General, etc are your tenants) is also fairly passive, but you maintain a bit more control. 

.), but the bedrooms are regular keys, as @Jonathan C. mentioned for the front door, the unit is set up to send me an email when the batteries are low. i also have another student rental ( 8 rooms, 2 entry, 2 units + utility room) one master key and each bedroom has its own key that will get students in the entry, there unit, and there own bedroom. had a locksmith do that one. cost me a few hundred dollars with keying and supplying the locks ( 13 total ). i like both setups but may look into the landlord locks again for my 3rd student rental i just purchased.

Do you see Nike cold calling customers or driving for dollars?

Add to that top dollar is being paid for rentals.

It can be like the clothes nobody wanted at the dollar store, it wasn't going to be great to begin with and what was usable in some way is already gone.

The cost to remove just one illegal will be in the thousands and way the government operates probably 100's of thousands of dollars. 

Heck, you should mortgage your home to the hilt, and borrow every single dollar you can at 6-7% and crush it on the arbitrage.