A good example is Richard Branson. Everybody assumes he started off with nothing, forgetting that he came from the upper middle class with access to considerable resources at low cost (eg the Manor House recording studio for given to him by his aunt). keep to the Fen Causeway
His basic MO until he sold the record division was to fund start-ups according to an agreed business plan that paid him max 12% ROI. (i.e. a very good return), all other profits went to the highly motivated owner/workers. However he was brutal if things didn't go according to plan. But to me this was a very smart plan.
But for all the smart business, Virgin would have disappeared without Tubular Bells. You can't be me, I'm taken