You want to understand all of those things and those options so you can better make the right decision for you and what you're wanting to achieve.

Note: I am from out of the US, so a CPA with experience in setting up LLCs for foreigners would be optimal.

I think you should look at your goals "gain passive income towards financial freedom" and see how you can achieve it.

Also look at how much you're cash flowing per door and determine if you could realistically achieve that by purchasing deals that are on the market right now.

I specialize in analyzing multi-family deals and love helping investors achieve their goals.

Repeat to achieve your larger goals.

It’s easy to show a high return on paper but you want to make sure that what is feeding into that makes sense and is achievable.

I have always wanted to own rental properties however it wasn't until I came across a few big names (Brandon Turner, Grant Cardone, Max Maxwell etc) that I realized I could achieve this much quicker than I thought it was possible. 

Even though we can achieve a good ROI in that area, we invest in other areas to avoid the headache.

The more I have to deal with such headaches, the less time I have to focus on more fun stuff, like optimizing costs and revenue :)  Hope that answers the question and feel free to let me know if it does not.