If you would like a challenge, get yourself a 1996 or newer Land Rover Discovery or Range Rover and try fixing the guaranteed to fail central locking or window regulators. A window regulator at a dealer is a 5 hour job. Owners who do things themselves avoid this job for as long as possible because it hurts to do it. Both of these systems can affect the alarm/immobilizer too, so enjoy being locked out of your car at a service station 100 miles from home.