Board Thread:Skyrim/@comment-112.208.138.147-20130802092735/@comment-6881629-20130802102932

Its a really buggy quest another way to start it is buying the house Hjerim but that means getting atleast halfway though the Civil War for the Stormcloaks or all the way for the Legion, doing the starter quest for the Dark Brotherhood Innocence Lost has been know to help some bugs, the wiki guide is here anyway (the bugs section has to be clicked to open).

I will say though the reward for the quest isn't that good (if you even get it).