You will need an accounting solution in addition to a Contact Management solution (eg the taza's reomaestros', etc.) A true accounting software has controls (checks and balances) on the money paid tied to the money owed. A modified QuickBooks(r) solution is a verified method to manage your finances. When it is set up properly (which takes some skill), and you balance the account(s) you will have the accuracy you need. Brokers who get up to 100+ properties are using a QB solution, and any broker with about 15 + properties should get started so that they remain in control with a proper system as they grow.

As you have probably noticed, using Excel doesn't have those checks and balances. Manual entry of the "owed" money (receivables) against the "paid" money allows too much room for error -- forgetten entries, deletions, no reporting.

You can look at the REO Broker Turnkey, www.reobrokerturnkey.com, for information on managing your receivables.