However, my long term goal is to acquire more passive income, namely, SFR and Duplexes, eventually with the end goal of owning complexes (and then passing Go and collecting $200).

Please clarify what your long term RE goals are.

My goal is to slowly increase the rent to market price over the next 4 years.

Rather, you have to find what works best for your situation and goals.

My main goals for getting into RE investing is that I'd like to retire by 40/45 (if possible) and have the freedom of not having to work for corporate America.Hoping I can learn a lot from this community and start my path for financial freedom!

Sounds like a realistic goal.

I think it all depends on long term goals.

As someone who has done tens of millions of dollars worth of real estate deals and millions of dollars worth of crypto investing, I see no good reason to combine the two at this point in time, unless the goal is to commit federal tax crimes. 

If the deal makes sense and meets your goals (CoC, cash flow, etc...) you should make the purchase.

Prioritise your financial goals for the next 5 years.