Financing options for 14 units (7 duplexes)

[John Clark]

My current rentals are all SFH with only one of them having a mortgage. MY plan was to continue with SFH until I stumbled across a 14 until (7 duplexes) for sale that looks promising. But that's the sticky point, it looks promising.  I want to run the numbers with the BP calculator but I don't know enough about financing multi family. 

My understanding is that I would need a commercial loan, which leads to a lot of questions.  But for the sake of the BP calculator, what are the going interest rates and what is the required minimum down payment. 

Any help would be appreciated along with any potential loan sources.  Thank you