Buying a property out of foreclosure can be a very smart move, financially. But it can also be complicated, expensive, and stressful. Here are 5 things to keep in mind before you take a first step in that direction: Cash Or Preapproval Required Buying a house that has been returned to the lender through foreclosure means dealing with bureaucracy rather than with a motivated seller. Large lenders are notorious for taking their time to approve a contract, even if the offer is for the exact amount specified. Then there's the paperwork, which can seem endless. Most lenders require that prospective buyers…