In my estimation, an entrepreneur or professional using his normal rate of return of, say, 5% to get to that $50,000 mark would have to accumulate a few million dollars, if I'm not mistaken, or over $1 million of passive investments to achieve, say, $50,000 in passive income to then be brought up from the small business tax rate of 9% to the general corporate tax rate of about 15% on their active income.
On April 24th, 2018. See this statement in context.