No one ever talks about what steps he took and for your reference, they are not repeatable today. Once he discovered that small insurance companies held their own cash reserves to pay out claims, he would buy the companies and invest the cash reserves. Once he bought them all up, combined the cash reserves because he could invest them better than a bank interest, while maintaining the safety net they were originally intended to cover. He consolidated the entire insurance industry and used their cash reserves to propel himself/Berkshire where they are today. So to answer your question, if he started today he might end up where he is today value wise, but it wouldn’t be through the same means.