The answer depends on the speed you can get a simple, professional website with basic information and a fillable form to capture customer data.

The advantage was clearly speed and that I was able to jump on a wholesale property that has continued to cash flow great for being our first rental.  

Do them both to speed it up.  

Truly aligned with the content of using Real Estate in order to retire at speeds decades ahead of what they teach you at school.I am currently looking for:-Expand my network with like minded individuals.  

To me that is the fastest way to get you to your "retirement."

I rent out an apt/condo, I rent out the rooms.Utilities are included with the rent..When doing this it's important to put on lease your utility Caps and to be clear.For example for water my cap is $50 anything above it gets divided by 4 (each tenant)What I notice is very important to these tenants is high speed internet they typically don't even watch Cable TV.

That should allow you to get bulk pricing and speed up the install, all of which cut costs.i'm local and am happy to discuss further.  

She had 25 years under her belt and was a wealth of knowledge.If I were to do it again, I would find the fastest and cheapest way to get licensed (online perhaps) and find a mentor or a team to join.

I feel like getting more units should be the fastest way to expand, but am I better off buying a bunch of SFHs and working my way into apartments or should I save and wait?

The demand for livable homes is magnified The ones that are fastest to market will demand the highest price Simple supply and demand