How does Partnering work? Is there a formula? Unspoken rule?

[Rosie Geller]

Since flipping my first deal I have had a lot of interest with Partnering up. Great opportunity to have more cash in hand and invest in bigger projects but is there a formula to follow? What’s a fair split? For Example, my BIL has a VA loan he can use, I have the knowledge and $ to rehab what’s a fair split for using his VA loan and how do we protect ourselves?