I'm lost on a Strategy, please help!

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I want to fix and flip.  My thought was to target owners close to a foreclosure auction (maybe 7 days out).  My local county website has the dates of property owners upcoming auction then if there is equity in the house and enough of a spread to make a profit... bring property owner current on mortgage and do a "Subject to" contract with 30 days to leave.  Assuming I can get property owner on board with this... We would contact the bank together to negotiate a shortsale or something?  Really I am lost, plan sucks.  What am I missing?