The easiest way that 401k and real estateinvesting can work together is through the ability to take out a loan against a401k. The primary objective with real estate investing is to use little or noneof your own personal money to fund the investment. Since you are allowed toborrow against your 401k, you can use this to finance part of your investment.When the deal closes, you will receive the amount you borrowed and then some. Youcan then easily pay back the loan without affecting your 401k.