Many Realtors will suggest purchasing a property using a FHA Loan, to reduce your out of pocket money.

If it’s the former I find it hard to believe anything but the absolutely most risky loans if that would pay 38% annual interest; if it’s the latter then you DO NOT get your $10,000 principal back at the end of the loan term, it is returned monthly as part of the amortized monthly payment.  

Most will not do 100% loan-to-value so plan on something less than that for the loan amount.2.

Will this be a more lucrative long term move than just buying an existing duplex or is this needlessly complicatedThanks It's needlessly complicated.

DSCR loans won't use your income to underwrite the loan. 

I was looking into unsecured personal loans but they only cover about 50-100k for 1 year duration.  

If you have scorable US credit, you'll get better terms.

Also, the term "house hacking" is generally used for your owner occupied home (renting out rooms in your primary home) and that income cannot be used to help you qualify (it is considered boarder income). 

(value minus loan)?

Usually, we're looking at credit scores, Loan to Value Ratio,  & experience level, for the rates and terms.