How to repay personal lenders?

[Jonathan Blandino]

Hey BP fam, I have been reading on OPM borrowing and wondering the different ways to pay back the borrowers. 

Lets say I borrow 100k from a wealthy college friend as a down payment for a multi-unit property that cash flows immediately. Of course, I pay the monthly expenses first and then am I giving the rest to the investor back until they are paid back an agreed upon interest? Can I offer a small portion of ownership in exchange long term? Also how do I determine a good interest that I know Im making them a good deal? (Im sure this varies if they are family or etc but I want to make sure Im giving my investor a solid return as well)

I guess Im trying to learn how to present the best option for my investor to build a long term relationship while not drowning myself in being able to make a profitable deal. (Ive rambled on long enough lol) As always thanks in advance for any advice.

BTW, I have a potential job offer that would relocate me permanently to the DFW area which I would assume has some better deals than my lovely northern NJ.