Contract with private investor and contractor

[Drew Oberholtzer]

I need some advice and some instruction on the proper procedure in writing up a contract with a private investor and contractor. I have a private investor that intends on investing $100K for a period of 5 years with a 10% return with an option to receive all investment after 3 years. I have a contractor who will be working as sweat equity on a fix and flip property. I'm not really sure where to begin with this and I'm not sure if it's best to write a contract under my LLC or myself individually. The contractor and investor won't be part of the LLC. Any feedback would be great. Thanks.