Made for TV movie where a space tourist crashlands in a small town in the backyard of a precocious kid who's read all the space books in the library. Their parents aren't around for some reason but they know how to drive already (rural) and decide it is Their Job to return the astronaut. Since this is a made for TV movie maybe it is the holidays and in the process he Learns The Spirit of Generosity and gives the rest of his billions to restore the small town. Hallmark my DMs are open.
The kid's parents were away at an agriculture conference or something but after a certain point they are trying to catch the kid but keep just missing them due to wacky hijinks like the space tourist rhapsodizing over how wonderful (objectively terrible) road stop bathrooms are or causing an incident at a quiktrip by knocking over the candy bars while forgetting about gravity. Because this is a Hallmark original presumably the space tourist had left the planet for the holiday season because he isn't close to any family but then witnesses this family's Touching Reunion. Fund my kickstarter.