Seriously, I'm doing it right now and I'm considering just not completing this particular quest. Why? Because sometimes I just want to try my luck at things, for example, I saved the game at the balcony where Mr. Tenpenny is always seated because I wanted to see what would happen if I did kill him. I killed him and I received good karma. I was baffled and took over the tower due to the good karma killing Mr. Tenpenny had given me, but when I was in the tower taking everyone's bottle caps since they were already dead(by the way, if you are having trouble deciding whether to do this quest based on bottle caps and material items, then taking over the tower would be better for you, Chief Gustavo offers you 500 caps for killing the ghouls but if you find the keys to all the footlockers in each of the stores from their store owners once they are dead you end up with ammo, more bottle caps, and medical supplies). Then I tried it vice versa, getting bad karma as well so I think I'm just going to leave this alone. Either way, Tenpenny Tower is indeed a morality destroyer, because no matter what you do, someone always seems to die.