A mechanical watch with its springs and gears may be more repairable than a digital watch with a circuit board, but I wouldn't consider the former to be "easily" repairable. Mechanical watch repair requires a lot of specialized tools and skills that a normal person, even one who is wealthy, is not going to have.

If you hire a repair shop to do it, expect your luxury watch to also cost luxury repair prices. The price has nowhere to go but up as I doubt there are a lot of people lining up for watchmaker's school.

When I got a passed-down luxury watch repaired at an authorized repair center, it costs more than the purchase price of all my other watches combined.