Farm 100%.
Obviously playing solo with 100+ players is impossible and shit, but with less players and sometimes even with high pop farm is the goldylocks zone.
1. PVPers don't go out that far, they're locked in on the main areas, for some reason they rarely go out that way.
2. Most of the time people don't even realise there's someone basing there.
3. With a decent setup most people only raid the back single door, and you can defend that very easily by just spraying through the walls, you won't get hit back, there's no cover out there for raiders.
4. Combo this with a house alarm and 35% of the time you can hold them off until the cops come and give you backup.
This game isn't supposed to be played solo, and that makes sense, but it kinda sucks sometimes.