While there is some room to doubt some details, there's also a fair weight of direct personal witnesses with a consistent story. More can be said on the matter of Erzsebet Bathory should anyone wish to address it, so more posts will always be welcome. For the meantime, we do have some previous posts on the case, both provided by u/orangewombat. Content warning for graphic descriptions of torture and murder in the linked posts. Read with caution.

• This Floating Feature post lays out an overview of the case as a whole,
• and they also address some more matters in relation to the case, including your question of whether they were after her land.