How to form a JV with family?

[Matthew Terry]

Hello BP Mates,

My mother-in-law wants to partner on a SFH with me. The strategy for me is I'll have 50% equity and profit sharing (and expenses) but the conventional loan will only be in her name so I don't use a mortgage slot on my credit. I will also be the PoC and operator.

Any advice on how I split the down payment with her without it being "gift funds" or me having to be on the mortgage? Know any good JV agreement templates to download?