No math just stating a typical airframe life expentancy and extension.
But if we were to translate full size flight hour to our models, I would say to takeoff, fly around and land takes anywhere from 30mins to 1 hour so we are talking 3000 to 6000 flights.
IMO something like a CARF Flash that is such a great flying and landing airplane could hit these numbers and there maybe some out there that already have.