Let me get first a job in that lighthouse. ....just to polish the lenses and take care of the light of course 0:)
by reading this phrase of Bearhug an idea plop up in my mind:
* Let's say you meet a NPC which has a sad life because his/her house/lighthouse/mill is (totally) broken !
* Now You can decide to
a) kill that sad NPC to rescue him/her from a sad sad life and take his/her accommodation;
b)find out how you can repair his/her accommodation and do it yourself (from your own point of view & taste);
c) try to convince the NPC that you will & can repair his/her dwelling-place and that you assure his/her sad life will be gone soon enough;
d) OR: you ask the NPC his/her preferences in the repairing of his/her dwelling-place ...
* Four (or more) possible outcomes now can see the daylight !
*** Just a few ideas?
* Killing the NPC maybe make other NPC's angry? Or your reputation go down more than once (in the long run)?
* Helping the NPC and build up like the NPC wish can maybe give his/her eternal gratitude with 1 or more nice rewards and or results: a unique item or a strng reduction on his/her prices (if the NPC appear to be a trader in his/her "happy life"!) or the NPC give you the possibility to live in the repaired building or if it is a mill or lighthouse you get a good job ....
* Of course you can ask other NPC's to help you to repair, like a smid, a Carpenter, a bricklayer, etc ...
Many quests/tasks can come your way up or you have to talk you out of tricky dialogs after you killed the sad NPC ! That all is up to YOU !