I am currently focusing my time and energy learning more about buy and hold properties (including leasing options) and mobile home parks options, both in my area and all over the United States.

Like everyone else, our goal is to generate enough passive income in the next 5-10 years for one or both of us to escape the corporate rate race.  

You are encouraged to timeblock 3 or 4 hours a day to cold-calling and lead generating activities.

Before I answer your question (as best I can), know that I believe you should only buy properties that generate a sustained positive cash flow and are located in an area likely to appreciate over time.

I would assume this is something that can be generated on MLS.

I bought my duplex a few years (and still live there with my three high energy dogs) and have accumulated half a dozen units with my family aside from that. 

I joined a couple mastermind groups to  learn and see exactly what it is I'm doing wrong, if anything, get ideas, ask questions, and to ramp up my business to generate more deals and income for next year.

That will free up time and energy to focus on the latter.

My initial angle once I do enter the investment world would be probably along the lines of what @Scott Nipp was referring to with generating seed capital before pursuing other endeavors. 

It does not surprise me that the younger generation is going through a major re-thinking of the owning/renting equation.3.