How to ask a family member to finance a down payment for a rental

[Ryan Taylor]

Hello!

I live in a midwest college town and I'm wanting to buy a rental property but don't have a ton for a down payment (probably around $5k) My older sister mentioned that she would be interested in financing a bigger down payment and just told me to come up with a proposal of how that would work and what she would get out of it. I'm open to either buying a house and renting the other rooms to roommates or preferably buying a duplex or triplex and renting the other units. I would be managing the property(ies) and the loan would be under my name. 

Have any of you done anything like this or have thoughts on how to go about making on offer on this sort of thing? She is being super generous in offering and I want to make sure I'm being fair/making it worth her while. I just need help figuring out how to structure a partnership like this.

Thanks!