Don't let your imagination run wild, just do the math. Coal exports are on the order of $50 billion[1], 1% of that is $500 million.

Meanwhile, the money already going into renewables is on the order of $15 billion per year (for the past two years)[2].

[1] https://en.wikipedia.org/wiki/Coal_in_Australia#Production,_...

[2] https://www.news.com.au/national/federal-election/almost-30-...