While stuck in his New Zealand mansion, Megaupload mogul Kim Dotcom will have to make it on $60,000 a month and a Mercedes along with his wife’s $20,000 a month and Toyota van while they await his extradition hearing set for August. Before assuming that they’ll have plenty of cash available, consider that the rent and maintenance of his mansion total around $1.6 million per year. Dotcom was arrested in January and his accounts, assets, and properties were held with restraining orders. The charges include copyright infringement and wire fraud associated with his file sharing website business….