My country house is left unattended 11 months a year. I want to remotely monitor it using all the capabilities of HA. I’ll plan to use Raspberry Pi 3 B+ with HA and Tor onion addon and some quantity of Arduino as peripheral devices.
The problem is that in the case of deadlock there will be nobody to reboot everything. Also how big is the risk of getting an boot fail Hassio due to power failure?
If someone solved a similar problem - share the experience. 
You could connect base devices like Hub/Rpi/Router to GSM socket so you can reset remotely even when no internet
Hi!
I have a similar problem, and a possible solution! I am currently on my way to my parents’ cottage to install HA. I’ve come up with what I think is a good way to do this…
I have installed Ubuntu 18.04 on a Lenovo Thinkpad T430, and have have hassio running in that by the generic linux install. The reason for using the T430, is that it has a “start on AC attach”-function, so that it will boot if the power comes back on. I have set up Ubuntu so that it will shut down if the battery becomes under 30% charged. The auto start on AC attach will not work if the laptop shuts down because it runs out of battery.
In case someone shuts down the computer by accident, I have put a Sonoff Basic with Tasmota in the PSU of the laptop. It will turn off power for two minutes every 3 hours. This will trigger the auto start function.
Hope this helps you in some way. If you have questions I’ll be happy to try to give you an answer!
Oh, and I’m using the cheapest TP-Link 4G router for connectivity with the DuckDNS/Let’s Encrypt add-on…
I agree. RasPi possibly will not withstand long term. SD Card fail is likely.
Use some old PC running Linux and install HA in docker.
HA itself can run months without issue. I would be concerned with hardware. Linux on PC should remove some of that.
Or don’t boot your rpi from SD card. They can boot from USB (model 3 anyway).