Interactive graphical user interfaces (GUI) are provided. Baseline data structures are received from among entity systems via data feed interfaces. An interactive GUI is generated on a display of a user device, comprising one or more screens to display the baseline data structures and user adjustment tools for customizing characteristics of a displayed structure. An adjustment indication is received from the user device via the interactive GUI, via the user adjustment tools. A characteristic of the displayed structure is adjusted responsive to the adjustment indication. Responsive to adjusting the characteristic, another characteristic of the displayed structure is adjusted, thereby reflecting an impact of the adjusting on the other characteristic, which adjusting and impact are dynamically displayed as the adjusting occurs, via the interactive GUI. A confirmation indication is received from the user device via the interactive GUI. A user-customized data structure is created responsive to the confirmation indication.