I am letting the partner pretty much dictate everything except for my pay. 

The market dictates the price. 

Where in town the house is located dictates the potential ARV of the home, once you have that number to can start to back into your rehab budget. 

Depending on how much is willing to cut me in will dictate whether I decide to do the deal with him or do it myself.

I am familiar with the process, and the title company pays you whatever is dictated in the assignment of contract as your assignment fee.In an assignment you will assign your contract with the seller to your buyer with an assignment of contract that will outline the original contract price and your assignment fee.

The market dictates which way I go. 

I am moving into one of my rentals and the terms of my current loan dictate that I can't live there.What are my options?

Its a bank statement in your or your lenders name showing you have the cash.All that said, your buyer's agent should not be the one dictating terms.  

State law will dictate, but most likely no state would allow you to write in a clause about who is liable for incidents.  

What makes you think you can dictate how much someone else should make?