Cool, working on a similar project, but having a different stack
1. Z-wave switches/outlets/locks - all lamps, receptacles and locks controlled by Vera Edge; 2. DSC alarm system - door/flood sensors, integrated with Vera; 3. Nest cameras - not integrated; 4. Nest thermostat - integrated with Vera and Alexa;
Currently trying to integrate Vera and Alexa to have fully voice- controlled home.