Repaying your most precious investor.

[Chris M.]

Through discussion about acquiring a large project, we tossed around the idea of getting a HELOC to handle the 20%. Then, out of the blue, my father in law sends me a text asking if we had any ventures to invest in, with nearly the same amount needed. #timeandopportunity

What's the best repayment plan to set him up on?  20% of any profits made from the venture? X% on the money for X amount of time? Interest only until we can repay the full amount? ETC.... Suggestions? 

Naturally the best thing to do is ask him what he prefers.  He says he's got no clue... So, there's that.   

What have some of you done to repay F&F?