Get In On The "Fix and Flip" Market   l Order a dumpster for the next ten days and get your demolition man to throw out everything including the kitchen sink. In other words, clear the decks.   l After the house is cleared of debris, it’s time to patch and paint. Let your painters blast the place with their airless paint-spraying arsenal inside and out. Within three days, you’ll have added a huge improvement to your investment. This is the biggest dollar-for-dollar return you can make. Make sure that quality paint is used. “When it comes to painting,” Dan Auito, author of “Complete Home Rehab in 10 Days,” says, “it’s the labor that kills you, not the material. If possible, …