7 days

[Arsilon]

BTW, if you haven't tried trader missions, it's not a bad way to go. Fetch quests and zombie clear quests will both send you to a property, reset it and have you clear it. Basically if you were going out for some random clearing anyway, you might as well do it as a quest, since you're guaranteed to get a freshly reset property to do it on, plus the trader rewards to boot.

This is especially handy if we're needing brass. Having a fully reset house with intact radiators is pretty handy (if you have the books that give you brass returns for faucets & doorknobs even more so -- if you don't leave them be for someone that does).