A portable remote processing apparatus facilitates various aspects of a transaction, such as a real estate property transaction. A seller of the real estate property can use the portable remote processing apparatus to prepare a walk-through of the property for prospective buyers, to configure the property for a showing, and/or to interact with a buyer device to negotiate a sale of the real estate property. Typically, the portable remote processing apparatus communicates with a remote server device, thereby limiting the amount of hard coding in the apparatus and improving the processing capability of the apparatus.