E.g vending machine (luxury food/drink items etc).

Steel doors and frames; Gated perimeter and main entry access with high security keys that cannot be copied (not just stamped "do not copy") or an access control system that uses rfid proximity readers, with remote access; excellent dusk to dawn lighting with poly-carbonate and/or protective screens outside; timed led interior lighting common areas; a quality, well featured and easy to use remote access security camera system; card operated laundry equipment in well lighted, space with folding tables and vending machine(s); establish "House Rules" for all with a stepped schedule for fines, use the camera system and access system to identify violators (including those dumping trash in the alley) and assess fines (or report to PD) promptly and consistently; do not hesitate to get rid of any troublesome tenants...DO hesitate to accept questionable prospects.

It would be a full service tunnel wash with vacume stations, vending, etc.

get a new attorney.The attorney can set up an appointment himself and walk right in (tell him to bring lots quarters because the inmate will want to eat lots of candy at the vending machine).  

How to turn the property around - Ways to increase NOIRaise RentsCharge for Extra Parking SpacesCharge for Storage SpaceRent Out the Clubhouse for Parties/EventsInstall Vending Machines OnsiteInstall Coin Operated Laundry FacilitiesSelling Ad Space in Your Community NewsletterAdd an Onsite ATM MachineInstall an Internet WiFi Network and Charge for AccessRaise Rents (The Ideas Above from my friend Susan Lassiter-Lyons)

Vending machines, car wash, u name it I want in 

While not real estate, I spoke to a few friends who said they were seeing returns of 75 percent on vending machine businesses. 

I use some of the real estate income to finance other investments like buying gold and silver, buy 2 ATM & 3 vending machines, raw land for private park slots & learning how to raise capital for more real estate and a business.

INCOME TOTAL RENTS X 12 = ______________________(GSI - Fully occupied total rental income) GROSS SHEDULED INCOME MINUS VACANCIES=________________EGI (actual, if less than full) – If full use min. 5% EFFECTIVE GROSS INCOME ADD____________________________________(laundry, storage, parking and vending income).

Supplemental features like laundry machines, vending machines, provide extra income not likely in SFH.4.