It has  very powerful free platform, as well as a great premium package.  

Everyone I spoke with said they could not/would not refinance a duplex with an ADU as it would make the loan intelligible to be packaged and resold...or something along those lines. 

Building positive communication with your counterparts, such as colleagues, team members, and peers, fosters a positive work environment.Create a positive organizational culture - Positive communication is fundamental to creating a positive company culture.

A basic GE stainless steel kitchen package runs around $2,500

Lately we are packaging a cutting board with two plastic champagne glasses and sparkling water.

Maybe you can try to talk to those lender's bosses to see if they know of a product, or find a lender that's willing to work with you to tailor a loan solution to you instead of trying to sell pre-packaged loans.

I have a realtor I use and a few different lenders that offer different packages that I can work with.

As a PRO member, you have free access to the Biggerpockets Lease Agreement Package under "TOOLS" at the top of your screen.

I am looking to buy an off market duplex in my area and am contemplating trying to package a couple houses together as the collateral for a portfolio loan.

You can close the transaction remotely via a Fed-Ex package or other overnight carrier, or perhaps a mobile notary or equivalent (maybe a bank where you reside?)