I know what you mean, what if this was a new location, rather than a player stronghold, a small barracks with some wastland survivors living there in total darkness, nothing works, they are eating mole rats etc. You get the generators up and running and then it becoms a small and well protected community. A one-off mission where you have to scour the wastes fro loads of junk, and a few books possible unique items, (a repair manual), teach the NPCs there how to use the various items.... Maybe repair manuals for several features of this barracks, 1 for sentry guns/bots, 1 for water purifier, 1 for food sanitiser etc etc. Could add several unique items scattered around, once done, you have a room there, with a trader, bar, a few others, and then you can bring 'parts' to keep the place running in return for ammo or something (seeing as its a deserted barracks). Must be well sealed, they only venture out for supplies, and many times, people dont return... Incentive? I think so, but this probably isnt what you intended by keeping a generator running. I like this idea, think it's awesome. Now to find someone who will make it :P