In a perfect world it shouldn’t cost anything.
Make the Congo region the sole recipient of all GW bullshit and watch it go money crazy. I’ll bet within 10 years it will be on everybody’s vacation craze.
Of course, after sending all of the worlds wealth to the congo, the only tourist attraction will be the opulent presidential palace in Kinshasha. Of course, security may be a concern as by then there would have been a coup per month for 3 or 4 years