Hey 
my parents will renew the electric installation in their house and asked me to plan the smart home part of the project. They have seen it on my house and really liked to be able to control every light and the roller shutters with Siri - so now they want it too 
They are not completely new to smart home, but they were impressed of how good it worked at my place.
In my house I’ve done it with Shellys flashed with either the “Shelly HomeKit Firmware” or Tasmota and Home Assistant running on a Raspberry Pi 4 (with Samsung Pro Endurance SD), which exposes the Tasmota Devices (along some other things) to HomeKit, as I’m mainly using HomeKit to control my stuff and Home Assistant more as a bridge and for some fancy things like a NSPanel I am fine with this configuration, until now I had no real issue and even if something goes wrong, I can fix it fast.
For my parents I also want to use HomeKit as the main user Interface because it’s easy to use for them - and because they really liked the NSPanel, I will need Home Assistant. But for them I need a reliable configuration - I could fix it if something breaks, but not immediately.
Now I’m considering what would be the most reliable configuration I could choose. It can cost a little more, but of course not exaggerate
-Running Home Assistant on a Raspberry Pi with an Endurance Card or SSD? Or use an Intel NUC?
-I’m thinking of Shelly Plus 1 for the lights, Plus 2PM (if available, if not Shelly 2.5) for roller shutters and Shelly Pro 2 (for some roller shutters that are controlled from the fuse box - weird setup). Or is there a better/more reliable alternative? I would like to go with the Shellys bc I already know them well
-Should I 1) stay with the stock Shelly FW and expose the Shellys via Home Assistant to HomeKit, or 2) use the “Shelly HomeKit Firmware” to avoid one possible point of failure (Home Assistant) for most parts, or 3) flash all with Tasmota (I will need Tastmota for some roller shutters as the stock FW and the “Shelly HomeKit Firmware” cannot control them)?