You don't need to run it from your home to get a 5am visit from the local SWAT team.
Run exit nodes from VMs in a country you don't live in, and run them entirely from ram.
You forgot to mention choosing a country that doesn't have an extradition treaty or similar with your own. So for me in the UK, it would rule out most of the EU and North America.
I'm in the US; I'm probably going to jail just for talking about this /s
Having documentation on an official-looking letterhead that you're running an exit node may reduce the risk of such a thing happening.
Only after the fact. Maybe.
It might help AFTER the raid, but probably wouldn't help prevent it.
It'll give the police and the prosecutors a good laugh.