As her income increases, I look to pay down our line of credit and snowball our early loans. 

You say to hook the garden hose to the "washer hookup on the house" but that's a water supply line, meaning water comes out of it.

Each unit is two bed and one bath with updated kitchen.

I would probably leverage it with a line of credit while you have it, most will look at your liquidity and net worth as well as credit score and experience.

They offer free on-line bill pay and can upload checks with their app. 

What do you guys think of a duplex with comps that are closer that differ in less bed/bath to be higher value than comps that are more similar further away that has less value comps?

Tyler, after Lehman you need both a 750+ FICO AND a 80+ PayDex which will require a EIN/DUNS maybe reporting vendors/suppliers or you can go directly into business credit cards if you have a good FICO and then credit lines/loans after those are reporting.

Is a Line of Credit more beneficial as to have the funds readily available?

But to me there’s no way the project can be successful if it’s bought above my bottom line number, unless folks have $15/sqft - $20/sqft construction budgets.

Unfortunately, all personal lines companies will have a 3-5 property limit before they turn you away.Once a landlord gets beyond 5-10 units, they should really be looking into options with a commercial insurance carrier.