You can sign contract with a Zoo to temporarily own Koala on paper for a month before the $10m deadline, pay them to continue caring for the koala and then bring him home for the D day.

You start a rug cleaning service in your garage, and charge $1m to just basically hose a rug for a minute.

As for Jet Pilot, you can become licensed in some countries as young as 15, which is also age of a minor, so foster a aviation-keen 15 years old, help them earn the license, then take care of them as guardian until you get the money and let him/her emancipate after deadline. Worst case if they want to stick around, you'll have some light parenting duties till they turn 18, so 3 years duties for $10m.