Buffett is no fool. Berkshire is providing the financing to Dan Gilbert's group and will receive guaranteed interest as well as an option to convert to equity. I'm sure that financing is jammed packed with warrants and covenants.
Buffett has basically parlayed the prestige of his name into sweetheart deals with provisions that no other company could get (eg. his investment in Goldman Sachs).
Buffett has basically parlayed the prestige of his name into sweetheart deals with provisions that no other company could get (eg. his investment in Goldman Sachs).