A computer-implemented method for aggregating real estate transaction data prior to initiation of an application for financing to calculate a true cost associated with a completed real estate transaction comprising the creating of an integrator portal for real estate transaction data from a plurality of private and proprietary real estate resources; accessing a plurality of private and proprietary real estate resources by a server hosting said integrator portal; linking the real estate transaction data to the integrated portal in real-time; aggregating real estate cost data based on a pre-determined property input and a consumer specific background input; and calculating a true cost associated with the real estate transaction from cost data, wherein the cost associated with said transaction is delivered to a user.