The costs of operating and maintaining the castle forced Brandis to sell her real estate to Klaus Landefeld, an information technology entrepreneur, in 2000. He converted parts of the complex into a business park for IT companies, and initiated the architectural reconversion of those parts that had been disfigured during the period of military use. When Landefeld's business suffered an economic downturn after the dot-com bubble had burst, these efforts were stalled.