As a reference point you can find some typical installation costs. Understand that these are high end systems, take a lot of customization and are infinitely expandable. It that all comes at a price, a high price.
At SiPhy we strive to provide you with a state of the art home automation system, that is of professional quality, but at a much lower cost point. Leveraging the latest in the IoT technology to substantially lower the overall system cost.