Many will disagree with me on this, but I have personally originated several loans underwritten with Fannie Mae for conventional financing and accomplished the financing when there are 4 leases for a 4 bedroom SFR. 

Hi Jason, For conventional loans concerning rental properties reported on your PERSONAL tax returns, underwriters will calculate your net rental income based on your Schedule E from your most recent tax return (using Fannie Mae form 1038), depreciation and depletion can be added back in to offset the expenses of the property.  

Whether it’s through customer databases, CRM platforms, property management software, or digital marketing efforts, real estate companies routinely gather personal and financial data for sales, leasing, and property management.

You can look at individual loans (conventional or DSCR) or as a portfolio.

You can put a little as 5% down payment for conventional or 3.5% for FHA.Alternative way, is to acquire the 2nd property as an investment property with conventional, while putting 15%-25% down payment.

Don't be discouraged if there is a lot of push back from sellers or agents at first, many of them aren't familiar with seller finance deals or have situations that can't be solved with seller financing (for example, as was mentioned above, they may need a more conventional offer to pay off their house and buy another one).

All 16 units would have to remain on same lot/deed forever (so in terms of value, I can’t capitalize on the duplexes being sold to conventional non commercial buyer) think financially it would be nice to phase it out one duplex at a time.

AND you can know put as little as 5% down on a conventional loan, which is a better loan anyway if you can manage the extra 1.5% down, does NOT have this test for 2,3 or 4 unit buildings. 

The amount of digital ink that is spilled on this site about LLC's and how to set up complex structures  by folks who can hardly be called investors is a bit maddening to me as it keeps folks from actually investing dues paralysis by analysis due to things that really do not mater a great deal.

It's since been resolved4) I had planned for 2% Closing Costs, but the Closing Costs are actually 5.3%, which is quite the chunk of change that I was not planning on.  5) I also had found out 3 days ago that this was a DSCR loan, not a conventional loan.