Don't move money around before buying a home!  If you are like most everyone who buys a home, you will need a mortgage.  The lender will review your loan package and will ask about the source of funds for your down payment and closing costs.  You will probably be asked to provide statements on your liquid assets--checking accounts, savings accounts, money market, CDs, stock, mutual funds, 401Ks, etc.

If you have moved money around in any of these accounts, there will be deposits, withdrawals, and the lender may require a complete trail of the money.  You may have to produce cancelled checks, deposit receipts, and it could become rather tedious.  So let your money be until you talk to a lender.  Don't change banks either.