Well, I'm having this issue for 5 months now and basically, it made me stop playing. I too was going for all the hoses and after reading a bit I concluded that the Windhelm house would best fit to my needs utility wise. At thistime I was lvl 50-52, had completed: dragonborn main quest, civilwar and went on imperial side, all words of power, had all houses available besides the one in WH, finished thieves guild and started nightingale quest chain as a nightingale but stopped before killing Nilsine or who the assassin optional contract target was due to a friend telling me that he did murder her and thus had read that you couldn't get tge house if doing so (witch by itself seemed to suck to me
...little did i know).
Also, before getting into detailed descriptions, I must say that Ive had this issue thru more versions of the game (i play on pc),updated from 1.something to 1.5+ that is curently out. I have been in and out WH many times before attempting to trigger this quest, very late in the game as previously stated. The thing for me is thatI have the amulet, I pickpocketed the key, I broke into the house from pure curiosity and that led me to the internet ..
as no quest triggered even on trying "investigate" inside. The new yarl made me thane but I cannot buy the house due to the standard "there have been some things happenin around that house and it's curently unavailable" text. All NPCs listed are up, even tho i cannot confirm the guard mentioned in the threads here. I have traveled my ass off in and out, spoke to everyone and everything, stalked ppl worse than the damn butcher himself. I thought maybe dropping the pending assassination quest might unblock whatever is blocked but I dunno how to do that, too bad there isnt such an option in the ui and be able to pick it up again later from the specific npc...
What I observed: sussana or what's her name ( npc that is supposed to die as 1st victim) doesnt leave candlehearth. (stalked her inside too, tried to attack her, thing that triggers another npc jumping in and bashing...her even more as she cannot die...immguessing thats good tho given my specific bug). She wont leave the inn damn it!
Another thing, I have seen Calixo stalk near the inn some times, but she just wouldnt go out. I repeat, I cannot start the quest, tried everything except console commands. What do you guise think? How can i make her leave the inn? This last house to buy so i can continue the assassin's guild chain but cant cuz im stuck thing simply made me quit and wait for a fix...a fix that never came
. And no, id like to do it on my "main" char that ive cared for and loved from since he was a lvl 1 nobody
Cheers, ty for the read and possible replies and gl.