Using a Family Member Investor for Flip Funding

[Gina Brunello]

I have a family member who has offered to fund my first house flip, cash. If he was solely used for funding, no part in flip/or rehab costs- what is the appropriate amount (%) of profit would be fair for him to take? I am fully able to obtain a conventional loan for the flip but to avoid funding costs and a 20% dp, I am considering the cash funding, also making our offer stronger. Please any advice and info is appreciated on how this works. Thanks!