@Harv Yergin IV My rentals are as high tech as they get ( video doorbells, smart thermostats, water leak detection etc.,) but smart locks weren't good ROI for me. 

Keep your cool cause this too shall pass.

Does a 9 year electric water heater last longer then a 6 yr?

My family currently rents a 950 sq ft apartment and honestly, I'm just sick of barely scraping by so I'm going to stop treading water and begin doing something!

We are looking at a 30-unit built in the 1960's, and the current building is set up with two oil boilers, one for the hot water, and one for radiator heat.

I ended up putting a condo plat on it which was really cool.

Don't forget to account for vacancy, repairs, capital expenditures, property management (even if you self-manage, there will likely come a time when you don't want to), and water/sewer (if you pay for them). 

When it comes to a group of trailers aka mobile homes the big thing I see is waste water and sewage .

Very cool, thx for sharing

Very cool!