Here’s my honest advise; consider studying for and obtaining your real estate sales license, and obtain a part time position with a real estate agency that will provide training, guidance, and oversight.  

The other positive, at least for apartments.com is if they fill out an application it's good for any other unit on the site for 30 days without having to pay the fee again.Not that it matters for the law but another thing we do for tenants after they are selected is do a gift basket that exceeds that in which they paid in application fees. 

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

I would suggest that you find a partner or mento who has done it before.Many of the investors that I work with in your position find that buying New Construction investment property from a builder is a better option. 

Possible (but I doubt easy) if seller takes a 2nd / subordinate position to the bank or is secured by other property you own.

Some lenders offer creative solutions, like a cross-collateralized loan, where they use your existing equity as security without refinancing the duplex.Another idea is partnering with private lenders or exploring a second-position mortgage, depending on your lender's terms.

People in the group are great, positive, and supporting. 

@Surya S KumaresanYou're in a great position to grow your real estate portfolio in Atlanta, a market with strong appreciation and rental demand.

Your looking at this really cool and unique position your in, and focusing on it as a problem.