Do shipyards that build yachts only cater to old money, or are they open to receiving money from any type of billionaire?

I had this question. If a guy who became a billionaire (new rich) approached a shipyard like Feadship, Oceanco, or Lürssen and wanted to build a fully customized yacht, would he be able to? Or do they only build yachts for those who were born into wealth (old money)?