Isabel Rose was convicted of trying to extort £100,000 from the UK banker and perverting the course of justice.
The agreement would fulfil a long-held Saudi ambition but could attract concern in Israel and from some US lawmakers.
The opening follows years of controversy about what to do with the 17th-Century former inn, where the Nazi dictator was born.
The seizure follows a long-running investigation into drug-trafficking networks, police say.
Daniel Siad, whose name appears in the Epstein files thousands of times, had previously denied knowledge of the threat Jeffrey Epstein posed.
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