What contract do you use for partnership on a fix & flip deal?

[Lionel Mosby Jr]

I am working with a few friends to start purchasing properties to fix & flip. I am wondering how others go about creating the contractual agreement for a partnership on fix & flip deals. Do you create a partnership or an LLC for each property? What do you do if people are bringing different things to the table (i.e. money vs. time vs. deal, etc.)? Any feedback would be helpful. Thank you!