Overall the expenses are $4,400/unit based on the TTM figures, which is a bit on the high side for what I'd consider an efficiently operated property.

Do you think rental properties is the most efficient way for properties that provide the largest cash flow?

I'm also a license real estate agent going on three years now, and am continually looking for new strategies to systematize and gain efficiency so I can keep the business growing.

Is there a room you could rent out or a space in your backyard you could build an efficiency in?

Richards, do you hate the existing floors or are you just hoping to improve air quality and energy efficiency?  

Everything's metered separately, tankless water heaters, efficient everything, looks great, etc.

This is measure is called Net Operating Income.This is all Income minus All Expenses.So in my analysis it looks something like this:Annual Rent (Monthly rent * 12) – (Taxes, Insurance, Maintenance, Management, and Vacancy Loss) Taxes and Insurance are often firm annual figures.Maintenance, Management are often stated as a percent of Annual rent (In most cases I use 10% and 8% respectively).Vacancy Loss is how to take vacancy into account in NOI.I often will use 5% of annual rent for Vacancy Loss.However NOI is only half the story.Second, one wants to understand how efficiently we are generating this cash flow compared to other investments.

It is efficient, however, do not forget, you are self-insuring the property side.  

Did not seem too bad to me, specially since I saw the potential to build an efficiency once I move there in a year. 

I learned that by building a network of professionals and resources allows the process of REI to be much more efficient.