It could be that Harry Potter is looking for a place to retire or just have some peace. Lord Stark's land might have some special features like beautiful landscapes or a unique energy that attracts Harry. He wants to own the land so he can build a sanctuary for himself and perhaps for other wizards who are also tired of the chaos in the wizarding world. He can then use his magic to enhance the land and make it a perfect place for relaxation and study.
Maybe he has a specific mission. For instance, he discovers that there is some hidden magical power or artifact on Lord Stark's land. By buying the land, he can explore and protect it without interference. Also, it could be a strategic move to expand the influence of the wizarding world in a non - traditional area.
He could use it to build a magical sanctuary for endangered magical creatures. This would be a place where they could live and breed safely, away from the threats they face in the wizarding world.
Well, it could be about Harry and his friends having to journey into the Land of the Dead to retrieve a powerful magical artifact. Maybe they need it to defeat a new dark wizard who is using the power of the dead to gain strength.
Perhaps Sansa Stark accidentally gets sorted into one of the Hogwarts houses when she arrives in the wizarding world. She could be in Gryffindor, despite her more Slytherin - like qualities from her time in Westeros, and this could be a source of internal conflict for her. Harry Potter could help her come to terms with this new identity. Together, they could work on solving a mystery within Hogwarts that has ties to Sansa's past in Westeros, like an old magic that was once used in the Seven Kingdoms and has now resurfaced in the halls of Hogwarts. This would blend the two fictional universes in an interesting way.
Maybe Harry travels to the Marvel universe and tries to learn from Tony Stark. He could be interested in Stark's technology for some reason related to fighting Voldemort, like using it to detect Death Eaters.
Yes, there are likely some out there. Fanfiction platforms have a vast range of stories, and crossovers like this are not uncommon. You can try searching on popular fanfic sites such as Archive of Our Own or Fanfiction.net.
It could also be related to the treatment of Harry's friends or allies. Suppose Fudge is persecuting Dumbledore or other Order of the Phoenix members. Harry, who is loyal to his friends and those fighting against the Dark Arts, would be enraged and yell at Fudge. He wouldn't stand for any harm coming to those he cares about, and Fudge's actions in this regard would surely provoke Harry's anger.
Maybe she's yelling at Ron. Their relationship in fanfictions can be quite complex. If Ron says something insensitive or does something stupid, like forgetting an important task that could put their mission in jeopardy, Hermione would surely yell at him.
One possible reason could be a difference in opinion regarding the safety of the characters. Maybe Molly is being overly protective in a way that Harry feels is hindering their fight against the dark forces, so he yells in frustration.
I'm not sure where you can find it exactly. You could start by looking at popular fanfiction websites like Archive of Our Own or FanFiction.net. Just search for relevant keywords like 'Harry Potter' and 'Lord Stark'. But keep in mind, it might not be easy to find if it's a very niche concept.
Well, it could be that the story creates some sort of magic - friendly zone on the land. Maybe Harry Potter uses magic to make the land suitable for both wizards and non - wizards from Lord Stark's world. For example, he might create spells that hide magical activities from non - magical people in that area.