Based on cashflow, I would buy the biggest multi-unit I could afford, whether that be a trailer park, mini-storage or apartment building.Also I know there is a golden halo that appears every time someone mentions NNN commercial leases, but I'd be weary of anything that's not service based right now. 

My personal residence came with the Hampton Bays in the laundry room and storage rooms -- they seem fine over the last 5 years. 

@Joonsik Park, yes, Multifamily and Self Storage syndications

Has anyone added a storage shed to the backyard of your house/multi to rent out to tenants?

Does anyone have past experience with and Self Storage Building Manufacturers which they would recommend? 

Mobile home parks and self-storage would also likely work in this scenario.

@Alexandra Wenzel add parking and storage

It's the same basic game plan the self-storage industry uses.

On the other hand, there is a lot of new industry, investment, and construction just around the corner for GB, and lots of gentrification/value increase areas that will not initially make sense on paper, but if the long term buy and hold strategy is what you are going after, there are plenty of hidden gems and areas that off market deals today could lead to massive gains in the next ~20 years. 

Does it have a backyard or storage house that perhaps you can rent it out for $75-$100?