Well, it's not perfect proportions, but absolutely nothing reasonably suggests that it'd take hours, much less days or weeks, for Surik to get over to the Enclave, lol. It'd take minutes - not necessarily a few minutes, but still less than an hour, under reasonable claim. Anyways, there's a huge focus on this timeframe. All we know is that it's quick - the local scavengers never notice a difference despite their regular journeys to and from the Enclave. It'd have to be before they could make another one of those trips. So it taking days or a week is utterly ludicrous.
You don't need to base it off game mechanics at all. In fact, game mechanics are the only reason that the scavengers stand in one spot huddling around their campfire. They'd be walking around and likely keeping an eye on the Enclave because they consider it their turf. In fact, one of the scavengers has a clear line of sight to the Enclave (one of the damaged bits, too). If he and the others didn't notice the Enclave being rebuilt, it was because it was done too quickly - ergo, in minutes. Suggesting that it'd be hours or days or weeks before even one of them cast a glance at the Enclave and noticed something was different is utterly ludicrous, as I said. And I'm not saying you said it - but Skillz proposed those timeframes. It's not. It's in minutes at most.