ADVICE NEEDED: Water leak after a foundation repair

[Paul Leonard]

Hello, all!  We are new house flippers in San Antonio, and found out today that our current flip has a cold water leak after the foundation repair.  The company that detected the leak wants to charge a minimum of $1500 just to find out where it is, and then over $2000 to repair it.  OR they can replumb the whole home for just over 19K.  As with any flip, we are on a tight budget and I could really use some advice on how to proceed.  This is only our second flip, so we are very green!  Any words of wisdom or investment friendly plumbers welcomed.  TIA!