Can I invest in my Cousin's 1031 exchange?

[Wesley Brown]

Hi - My cousin is closing on a family farm he inherited and is looking to do a 1031 with a multi-family. He'd like me to be involved to manage the finances of it for a bit of sweat equity and I'd also like to put in perhaps 10% of the investment. Let's imagine that would get me 15% of the investment. 

Is that possible on his 1031? What would be the best way to structure that, if so? An LLC? Here in CA they are $800 per year so not a small percentage of our potential yearly net income. If it is an LLC or other type of corporation, would we take the mortgage out in the name of the LLC? How would that work for his 1031?

Many thanks!!