paying back an investor/partner on rental deals

[Andy V.]

I have an investor partner on a flip house deal that isn't selling after 5 months.  I'm considering renting  it out as a lease option with a sizable option payment (7.5%) plus a monthly rent of about $1,200 for 16 months or so.  That way we could possibly put it back on the market spring of 2017.  The investor has $107,000 in to the deal and the house is worth about $130,000 based on comps.  If I get a mortgage for 70%, I'll have about $90,000 to give back to the investor.  Plus, the property would positive cash flow about $400/month after mortgage, taxes and insurance.  Even if I split that with him to get him paid back sooner, it would take years and we wouldn't have much of a kitty should we have any unforseen expenses.  Short of keeping the house on the market going into a snowy winter, what's the best/quickest path to making him whole? He's been very supportive to date but we need to free this capital up for the next deal.  Any advice?