I'm renovating my house so its going back to brick so have the opportunity to go all SMART. I am willing to spend money on 'infrastructure' now knowing that I can change most other things later on.   I was originally going to DIY the solution with Shelly relays and openhab but realised it may make it harder to sell or pass on if necessary... I contacted a company about a KNX and control 4 solution but the cost was eye watering and there were ongoing maintenance fees....