Derek is going to eventually take over a garage-with-a-defensible-apartment-over the garage within the next week or so. The garage will have all the common defenses to keep out the nasties. The apartment will be better rigged with some alarms/traps/etc. I'd say he'd get a cat, too, just to have some company, but IDK if it would monster out at night with the rest of the animals, lol (although that might be a plot idea...).

I think he'll go ahead and take over the mechanic/weapons care role if folks will let him.