Looking for a contract sample to use with an investor and ADVICE

[Rion Manita]

Good Day Bigger Pockets,

I hope this finds you well. I am working with a long time friend and client that is interested in funding a project 100%. 

Would anyone be willing to share a sample of a contract between the investor and the person doing the work?

Is 30% of the profit margin fair for me, granted I am not investing any money, only time.

Thank you!