Storage income (if tenants pay for storage sheds/lockers etc) Laundry income (you had laundry XP but not income) Vending income (if property has vending machines) Expenses ... 

Washer/Dryer, Internet, Cable, Vending, Amazon, etc.. 

Amazon.com: Happybuy Coin Operated Timer Control Power Supply Box Coin Acceptor Programmable Control Coin Acceptor Multi Coin Selector for Vending Machine Electronicial Device, 110V: Industrial & ScientificLearning to program it is a little more complicated than I expected. 

I own a vending machine business(LLC) with my parents and we also, own a warehouse for the business as well and it is completely paid off.

Just off the top of my head : sub meter the ,utilities create washer dryer area, LED lighting, vending machines, look at renovations!

I NEED to get time out of my vending truck and into investments.

Change is inevitable except from a vending machine!!!.

You didn't really want the coin operated vending machines in the lobby of the small hotel, but you will give them up to make it work.

The list is endless if it adds enough value that the residents want to pay for it to boost your ancillary income, or boosts your NOI in any way you add value.Just a few:- Laundry Coin laundryDetergent/laundry essentials in vending machine in common area laundry rooms. 

Other ways to increase value would be to find places to cut or lower expenses (laying off bad maintenance or property management or renegotiating cable or landscaping services lower or even taking water or other expenses and making the tenant pay for them if that's common in your area) and finding ways to add income besides raising rent (putting in vending machines or coin laundry, storage units or parking spots).