bespoke car Porsche is building 15 one-off cars for ultra-rich customers with one that could cost as much as $15M 1st Nov 2026 Rolls-Royce needed a $400,000,000 site expansion to accommodate growing demand for bespoke cars 9th Jan 2026 Mystery wealthy Australian customer flies to Detroit to customize and buy a Cadillac Celestiq 17th Jun 2025
