Best way to find home needing rehab

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What is the best way to buy a home that needs rehab.  I am intending to either flip the home or keep and rent it out, here are the ways i know of and am deciding which one.  Wholesaling(going to wholesaler to find one), foreclosed, short sale, and regular non foreclosed property.  

Anyone have experience with this?, which is best way to start.  And o yea, i am doing a hard money loan for this