Contracts for Privately Lent Mortgage???

[Alex Andrews]

Hello! I have a family friend who has excess cash from a small business and is willing to lend to me for RE investing. I am interested in using this cash to purchase an undervalued rental, rehab, rent and cash out refinance. Does anyone have access to a sample mortgage contract I could use with this family friend? I want to have everything lined out in writing to put everyone's mind at ease. 

Any help is greatly appreciated!

Thanks,