Did someone pay him for the rare meteorite? At least enough to fix the roof?
Who should one contact if this happens?
someone recently SOLD a t-rex skeleton for $50 MILLION (61% complete)
so you should be able to sell meteorites that land on your property
only thing you can't own/sell is NASA Moon Rocks
Everybody knows that. You contact NASA. Then a black helicopter will pick you up, bring you to an airbase and fly you straight to the white house, where you will be introduced to the actual truth, while a team of very excited scientists with biohazard suits praise and examine the artefact. If you're still sceptical, they will take you to a large hidden hangar in the middle of the desert and show you around.
In the US, if a meteorite lands on your property, it's yours and you can sell or donate it as you please. This homeowner probably made a decent amount on the sale, especially with the emphasis on immediate preservation.