Is partnering on buy/hold a sensible approach?

[Ken Harris]

I am talking to an owner facing foreclosure in Feb. He wants out, and current reinstatement/payoff is $168,400. House value is around $190,000, but it will need a new roof (approx.$7000). I have enough for 10% down, but not the needed 20%. House is in good shape other than roof. Based on rental comps in the area, it should rent in the $1500 range. I am new at this, so would like your thoughts on seeking a partner - 50/50 on all expenses, cash flow, and appreciation. Is partnering in this scenario a good idea?