Loan Down Payment Help

[Ryan Hendershot]

I am looking to buy a property and I will need about $35,000 for the down payment, closing costs, etc.

I have a partner that would be willing to come in and cover the down payment for an equity share in the property. 

How should I go about finding out how much is a fair amount of equity to give? I would be managing the property and he is simply just covering the down payment fees. 

Also, how should I structure the repayment? Simply on sale of the property, payback investment plus interest? 

Should he get a portion of the monthly income as well, equal to his percentage of property owned?