You can become your own pilot and mechanic, buy a big plot of land and build your own hangar and helicopter museum, get a helicopter that runs on diesel, open a McDonald's franchise and use the oil to run your helicopter. I ran some numbers and this turns a profit. You can also sell helicopter tours of your helicopter museum for more $$$ and possibly be the first McDonalds to offer delivery by helicopter. With the profits you can buy a 2nd helicopter which, by my number, doubles everything!

Full disclosure: I'm a bad mather, but I'd be a great rich person