Never go with one offer. 

I currently struggle with knowing the right offer price for the homeowner and having the right assignment agreement for Az.

After talking to another family member they said they would be willing to go in on the duplex and offered to pay the $40,000 down payment and help with any repairs but they want to be "partners" or "own" a percentage of the duplex.

Quote from @Rick Im: Does anyone know of a lender that offers second mortgages on rental properties?

I charge a completive market rate while providing a really good service. 

Start anywhere—offer to assist, intern, whatever it takes—and absorb as much knowledge as you can.

Welcome and thanks for your service!!

This is the only thing holding me back from making an offer on this really good deal.

I know out here on the West coast with our digitalized title plants that each title company has it would be a matter of a few clicks for customer service department to transmit a copy of the mortgage to me..

Most people call their services "cohosting" to distance themselves from what would normally require a real estate license.