Question about partnership structure - how to split properly?

[Sebastian Durden]

Hi all, I am looking to team up with a sibling on a deal and am looking for guidance on how people typically structure partnerships. It is pretty straight forward - I would provide the sourcing, the loan vehicle (it would be my primary mortgage loan), and the property management while my sibling would bring the downpayment. The down payment would be anywhere from 5-20% of the deal. 

Is a 50/50 split of all cash flow and appreciation appropriate? Or is there a better approach that typically use? 

Thanks so much all!